PDF malware analysis — malicious · 19972ed6dc7e86f7

MALICIOUS

PDF

88.1 KB Created: 2021-07-04 03:18:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20

MD5: ff5f907265e7a846000f19f902d4990b SHA-1: 9b6deae23926c0159856dc4f9b18d83b5e7e2749 SHA-256: 19972ed6dc7e86f75394d5c303a922e4b279aa1d3196375a6a4f2bbbef735607

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised websites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and link farm heuristics strongly suggests a phishing or malware distribution campaign.

Machine Learning

Nyx PDF Classifier malicious score 0.9835

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
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 https://valserve.in/web/k/main_admin/ckfinder/userfiles/files/47173323250.pdf In PDF document text
- http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/160a455dc1bc20---60512645865.pdfIn PDF document text
- http://panteres.com/files/files/burofiserupivitil.pdfIn PDF document text
- https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/qfb3maed92u930dvrnp5ig7bo4/83711986712.pdfIn PDF document text
- https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160becc74372ea---xuwimibimav.pdfIn PDF document text
- http://mmprogetti.it/userfiles/files/woxatajinegulukijenefak.pdfIn PDF document text
- https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/e2585e3c9240c861c9f14da9a9b0f50c/karoz.pdfIn PDF document text
- https://cor.org.ar/wp-content/plugins/super-forms/uploads/php/files/51934ue0ng9e2bee8nivcchrd9/tifapemodiretimubibeg.pdfIn PDF document text
- https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/t8hbnjea1ajebap55bee1sk79j/53728359888.pdfIn PDF document text
- https://signika.pl/Upload/file/66480070855.pdfIn PDF document text
- http://architects-desk.com/uploadsfile/zutikobufuwi.pdfIn PDF document text
- https://blueridgelightingandcontrols.com/wp-content/plugins/super-forms/uploads/php/files/956a962ac0e0e463a37e83f3351cb45b/jamemol.pdfIn PDF document text
- http://archissimo.eu/userfiles/files/78255422253.pdfIn PDF document text
- http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/160d5e566e407f---41938272595.pdfIn PDF document text
- http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160826f16e4430---puwen.pdfIn PDF document text
- http://www.mywil.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160c9baabb06ff---6257441538.pdfIn PDF document text
- http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609e90a799be7---85996662002.pdfIn PDF document text
- https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/d9e8a3d0a69b9cd007ba8f0cf822b214/55940661937.pdfIn PDF document text
- https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/338c61fc2cc3f663524bb565e1a585f4/fetefonijajes.pdfIn PDF document text
- https://www.andrecampbell.ca/wp-content/plugins/super-forms/uploads/php/files/d456c6ef92382395677067a3b32368c5/21437694536.pdfIn PDF document text
- https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/5f112ff67939f688d66daf0d7148930a/pexub.pdfIn PDF document text
- https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/22d5bddae8675e3ac48c8c08ee0ec822/xebanifa.pdfIn PDF document text
- https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609157f75bbfc---62644750910.pdfIn PDF document text
- http://hutbephottaihaiphong24h.com/upload/files/jokadev.pdfIn PDF document text
- https://adreshosting.com/calisma2/files/uploads/2812635149.pdfIn PDF document text
- http://anaminfo.com/attachfile/file/8693674302.pdfIn PDF document text
- http://recruiters-zone.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072a0d36e061---95645531306.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=w+4+single+or+head+of+householdPDF 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_off0000f46d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF46D	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00010c7f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10C7F	17180 bytes
SHA-256: `996e485a168a332374973b0f6abac90cc83d99a4389ddb0ec6a434f26c4b6c95`
`font_02_sfnt_off00013941.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13941	10704 bytes
SHA-256: `44b966941b9d784835fa29daeeb121c163039e74de0a2594cc9d3857264fae77`

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