PDF malware analysis — malicious · 2ca056b2666ef6a1

MALICIOUS

PDF

100.7 KB Created: 2021-06-29 16:46:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13

MD5: 5b2ea8de63046dd9ea285cb318fd95ec SHA-1: 3cc090f1a1f4d3cc2f5d014f1c33a362cc06cfb7 SHA-256: 2ca056b2666ef6a17ecda19eb6ac9f8901eaa191b850471863989643aa569143

216 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document was flagged by multiple heuristics and a machine learning classifier as malicious. It contains a 'Recovery secret / private key request' lure, indicating a phishing attempt to steal sensitive user credentials. The document also hosts numerous links to other PDFs, many hosted on compromised WordPress sites, suggesting a link farm designed to distribute further malicious content or redirect users to phishing pages. No scripts were extracted from this sample, but the overall structure and heuristics point to a phishing campaign.

Machine Learning

Nyx PDF Classifier malicious score 0.9787

Heuristics 7

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE

Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM

PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM

Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
External URI info PDF_URI

PDF contains an external URL action
Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL

The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
URL http://photographybynami.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607af7c9d3c56---fosulufelusew.pdf In PDF document text
- https://kassa-evotor.ru/wp-content/plugins/super-forms/uploads/php/files/4tj7knev4fg6do1ntrokfihch8/witumoxisuviwusi.pdfIn PDF document text
- https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160807cd9afbd1---43608210277.pdfIn PDF document text
- http://amazingindiaphotos.com/amazingindiaphotos//upload/fckimage/file/99081323730.pdfIn PDF document text
- http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbe374e3cd---gubuwigujewazixezuvej.pdfIn PDF document text
- https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/c6d283f2c21e2c3f94f46d06b327a60b/98754169703.pdfIn PDF document text
- http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/8q6ekarmtajvnn1lnht79rddd4/98889243965.pdfIn PDF document text
- https://onlinendttraining.net/files/sumuwefuvejezabubi.pdfIn PDF document text
- http://asahiru-ban.com/files/files/15529466932.pdfIn PDF document text
- https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/msrdo0jn6rgfi0gc6n5dhr13u0/zizadujaxuba.pdfIn PDF document text
- https://c4ir.ae/wp-content/plugins/super-forms/uploads/php/files/aq1esluqenok8opisuhb6at306/zorenukesezutamiwum.pdfIn PDF document text
- https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/vm3vr6ap279votogdvpbndflfh/922002417.pdfIn PDF document text
- https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/5b8d06e916ea8305bb00a089b1c8b421/28936599877.pdfIn PDF document text
- http://omak1968.com/clients/71178/File/34019000477.pdfIn PDF document text
- https://www.infrascale.com/wp-content/plugins/super-forms/uploads/php/files/655d29bd48d2bdf02b4b864448f91e58/839661781.pdfIn PDF document text
- http://learnersdigest.org/userfiles/file/27065699610.pdfIn PDF document text
- http://chalappuram.com/userfiles/file/94666221364.pdfIn PDF document text
- http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070016b0d4e0---tawola.pdfIn PDF document text
- https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afa9808a3c2---80273952003.pdfIn PDF document text
- http://extracam.es/app/webroot/arxius/file/fomowi.pdfIn PDF document text
- http://edgecs.net/documents/88655441328.pdfIn PDF document text
- https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/b43b07a0905b28f51166d388df07409e/22548442890.pdfIn PDF document text
- https://unicornproduction.gr/wp-content/plugins/super-forms/uploads/php/files/b883763df9ddeb2cc44c08bad07b8493/pafevo.pdfIn PDF document text
- http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160879fdfa9f64---mekukemowerufegupazosufix.pdfIn PDF document text
- http://dzbnf.com/upload/file///9841550632.pdfIn PDF document text
- https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160797c9436a03---rikejusasosumurafuvidip.pdfIn PDF document text
- http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/7u29199gi4eeea0hjok038utdm/vosunutivivepofo.pdfIn PDF document text
- http://citra.cl/userfiles/file/71288651551.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=802.11+g+securityPDF link annotation
- http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
- http://purl.org/dc/elements/1.1/In PDF document text
- http://ns.adobe.com/pdf/1.3/In PDF document text
- http://ns.adobe.com/xap/1.0/In PDF document text
- http://ns.adobe.com/xap/1.0/mm/In PDF document text
- http://ns.adobe.com/xap/1.0/rights/In PDF document text
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00012a0f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12A0F	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00014226.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14226	10660 bytes
SHA-256: `7dc5e310ba550440549614cf42849dc179bd90c7d98bcac7655bd2465f03617d`
`font_02_sfnt_off00015ad5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x15AD5	16464 bytes
SHA-256: `e4068e4223d7bb296c8ba89b570c3a46ae648a236e127068c1a202a90edcbd6c`

Open this report in the interactive analyzer, or submit your own file for analysis.