PDF malware analysis — malicious · 38a44d06f1ce1e71

MALICIOUS

PDF

90.0 KB Created: 2021-07-19 09:35:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23

MD5: f91b0b240d1e6e4e9bf2368ed214bf9a SHA-1: ec14302c2af3fd81d0d7d5406f9efa5525c8d3eb SHA-256: 38a44d06f1ce1e71ae3f11cf53b3d3381130feff9a0406ee6672dd987c3d9d45

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised CMS upload directories and disposable hosting, suggesting a link farm or phishing lure. The PDF structure and embedded links are consistent with attempts to redirect users to malicious sites for further exploitation.

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 http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf0a84325c0---19696219310.pdf In PDF document text
- http://uss100.com/clients/5/56/562308f4da1da23328cfd9e5c9f3e68f/File/bosinumesowimexo.pdfIn PDF document text
- http://www.asap-recruitment.net/upload/file/53375696484.pdfIn PDF document text
- https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/2c8dba1484c05e5d600ee96b993acb6c/98074226172.pdfIn PDF document text
- http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/16072fe70a030f---pimokegolemepa.pdfIn PDF document text
- http://www.apsetedavisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079b8c9745de---tuxowidejutuxevebabasuf.pdfIn PDF document text
- https://edu-mate.kr/_UploadFile/Images/file/79536652241.pdfIn PDF document text
- https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/a141c6ef07f928d3974aa82949c5764d/87945078985.pdfIn PDF document text
- http://www.deco-interieure.com/userfiles/file/mowakox.pdfIn PDF document text
- https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/a2q53l5hrqjtjb088hihldjin4/nukedazakonaliri.pdfIn PDF document text
- http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/pu429o5cjlfsbq0bs51hjmenr1/vejaxuxafan.pdfIn PDF document text
- https://teenvolunteerhouston.com/wp-content/plugins/super-forms/uploads/php/files/e65d21fb85594cf62ccb545628e6bbae/sidamezabufipi.pdfIn PDF document text
- http://kozszemle.hu/uploads/files/79101216486.pdfIn PDF document text
- https://refour.dk/wp-content/plugins/super-forms/uploads/php/files/77773f4e3e4c0c79bb6d6af6a8952420/75595746094.pdfIn PDF document text
- http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/1607eb4773c6e2---jolufipisawi.pdfIn PDF document text
- http://windmill-bv.com/userfiles/files/pukit.pdfIn PDF document text
- https://chrmglobal.com/userfiles/file/faradijuxigejev.pdfIn PDF document text
- https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/20e14a5f67d048b61af95991c0f5597f/35497152288.pdfIn PDF document text
- http://iccj.jp/images/uploads/fckeditor/file/87486762720.pdfIn PDF document text
- http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ca49dc26cf8---93196096623.pdfIn PDF document text
- https://pjkconstruction.ca/images/file/87949835731.pdfIn PDF document text
- https://unique.global/wp-content/plugins/super-forms/uploads/php/files/cfbd31ec6394ca9df0db3a34d3adf196/94920154009.pdfIn PDF document text
- http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098b602de1fa---93391581456.pdfIn PDF document text
- http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc0981f4ed---54198293791.pdfIn PDF document text
- https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/32d8c49bb5c351d3d1532276deea88ef/34510072488.pdfIn PDF document text
- http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/04lfdfql0re1kpkiu3qvh0s29m/suxanokululu.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=how+to+use+minecraft+command+blockPDF 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_off0000fa8c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFA8C	11048 bytes
SHA-256: `45c4631e06670976f3f84b274b6edbd8c4c6dc66baa34a73336dbd3e9a734ae4`
`font_01_sfnt_off00011440.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11440	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00012c52.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12C52	17528 bytes
SHA-256: `d554cd0e640c1c440e3ee4cd502a76576de5942c4f0c2eb625809ec4ac22b28a`

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