PDF malware analysis — malicious · 68ee40cd719b2003

MALICIOUS

PDF

104.4 KB Created: 2021-07-17 23:50:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: 0875eefbe0bffb392e10e68e2124bdff SHA-1: c30989d2d1c0779a414a73b6f689a84d7443646e SHA-256: 68ee40cd719b2003b029a87fd2cfd6609ff9489b6c9122d7dcca91adba835196

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress upload directories, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of a 'download button' heuristic further supports the lure to download a payload.

Machine Learning

Nyx PDF Classifier malicious score 0.9919

Heuristics 7

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.
Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON

Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2acc360c31---50410331289.pdf In PDF document text
- https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/8195bd8nj2pvf6sur3lqmoiek9/29170916407.pdfIn PDF document text
- http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a2a8e26812a---nizogid.pdfIn PDF document text
- https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/516fb0eb85140ece2e122f205dac6ce4/87148603947.pdfIn PDF document text
- https://mumegram.com/userfiles/file/25548477721.pdfIn PDF document text
- https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/26ce80d3c9f41192a3f3fa522e72a765/kimajariziz.pdfIn PDF document text
- http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606fa4887f185---32542090083.pdfIn PDF document text
- http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/62d9ced7863154ba982d0c07511014b9/xidofegagofisabugad.pdfIn PDF document text
- https://www.mii.net/wp-content/plugins/super-forms/uploads/php/files/6eacb0934bfb1318d321fd98afeb457c/wizujada.pdfIn PDF document text
- https://shayangroup.net/wp-content/plugins/super-forms/uploads/php/files/4b6aa645e6d8466fbc8d5537792ca331/84092654848.pdfIn PDF document text
- https://www.domosystem.gr/ckfinder/userfiles/files/lubatukojalozepup.pdfIn PDF document text
- https://www.tunnel.de/files/uploaded/file/zabidaxoxubor.pdfIn PDF document text
- http://businessplan-capalpha.eu/mbp/upload/images/images/upload/ckfinder/6641068916.pdfIn PDF document text
- https://alzubidi.com/userfiles/files/lewalinariletivatovovuv.pdfIn PDF document text
- https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/e2c40051ba013a9d62b1e5ba41c4f9e7/bujibesuxejuvebimi.pdfIn PDF document text
- http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b70ee3aa021---21939374009.pdfIn PDF document text
- http://aeskulap24h.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a0d41f6a0e1---xarudolewezekalokuw.pdfIn PDF document text
- https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/6712fb60f74056cfcec7d450c0164788/80643057445.pdfIn PDF document text
- https://www.piramideidiomas.com/ckfinder/userfiles/files/vejunumexu.pdfIn PDF document text
- https://bestcoloringpages.com/userfiles/file/84711170104.pdfIn PDF document text
- http://highlandhighclassof1962.com/clients/c/c3/c330a44b04b080977bf299ea430a317d/File/71476624879.pdfIn PDF document text
- http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609df3a4e4a39---tapudozadimobusupuf.pdfIn PDF document text
- http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b5e89cb4c5d---5541123106.pdfIn PDF document text
- https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/75e7a5033aefe4d8d4fc8f3a4a992f8d/5599589166.pdfIn PDF document text
- https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/61a1693f60a34c7b43d69b5a8ea4bbbb/76554219846.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=laudato+si+for+studentsPDF 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_off00013558.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13558	10360 bytes
SHA-256: `06afbe744336529c3d7ae599af95988b0feb3f6f917bfebafdfca589a6b38e38`
`font_01_sfnt_off00014cdd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14CDD	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off000164ef.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x164EF	18660 bytes
SHA-256: `55117758afa6a93bebc30dfdf1d29ae7b4121316a61a8b34c32f86656c27d27c`

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