PDF malware analysis — malicious · 29e98d2df5238fb7

MALICIOUS

PDF

124.3 KB Created: 2021-07-13 20:22:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07

MD5: a45eb88a66cd9a0598a79b9d448f0c13 SHA-1: de0ce7b8155c80e25323a9284e541e2c2ca49e7a SHA-256: 29e98d2df5238fb7dbd2fc18357a5c38b07511bf656a893db1026674719289f4

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, and exhibits characteristics of a link farm hosted on compromised WordPress sites. The PDF contains numerous URLs pointing to these compromised sites, likely serving as a lure to redirect users to malicious content or phishing pages. While no scripts were explicitly extracted, the nature of the link farm suggests an intent to exploit user interaction via embedded links, aligning with spearphishing tactics.

Machine Learning

Nyx PDF Classifier malicious score 0.9956

Heuristics 6

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

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/993076ab12dcc3d84299ee2e1258e5a3/10818677673.pdf In PDF document text
- https://agrilaui.com/userfiles/file/zasisitesawasonow.pdfIn PDF document text
- https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be69fca6133---59713658603.pdfIn PDF document text
- http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607dbd67703c5---vamegu.pdfIn PDF document text
- http://metabolit-plus.ru/files/file/dogepovi.pdfIn PDF document text
- http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b114cb88af---5063852842.pdfIn PDF document text
- https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608a52d98dc59---94414393055.pdfIn PDF document text
- https://beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/973d89754f2aa9d34ad1d0a94f454c02/73102037580.pdfIn PDF document text
- http://dataction.org/demo/dataction/media/79611540393.pdfIn PDF document text
- https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/7fd2243180043e1b83b49470b78e468f/vinagezuluxur.pdfIn PDF document text
- http://csc0851.com/userfiles/file/20210613221119_1a75le.pdfIn PDF document text
- http://cp-1.ru/userfiles/files/fekage.pdfIn PDF document text
- http://jogamiskolc.hu/ckfinder/userfiles/files/ruruxewenu.pdfIn PDF document text
- https://grafitpoint.ru/wp-content/plugins/super-forms/uploads/php/files/6e61abe4958e08f5476e0b2891ecac78/lusefiresupes.pdfIn PDF document text
- https://criteriacambio.com.br/wp-content/plugins/super-forms/uploads/php/files/lh5p9cdrircs7sphru9vskg2hu/17907286664.pdfIn PDF document text
- https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/qgaadh6an6c2mlc1icdrc4ms66/9705741425.pdfIn PDF document text
- http://mousike.it/img_ins/files/puxuzuzenudumagowuzog.pdfIn PDF document text
- https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/qh3ua6rk24j3v3k1icjrbfl9qs/32523673446.pdfIn PDF document text
- http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160840bf34c21e---28358559837.pdfIn PDF document text
- https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fd12cb3bae---milopolisibux.pdfIn PDF document text
- http://iccj.jp/images/uploads/fckeditor/file/46527774178.pdfIn PDF document text
- http://hi-reid-solutions.com/wp-content/plugins/super-forms/uploads/php/files/095cbabb5257abb2c75f70e36e8a0ed1/74684214128.pdfIn PDF document text
- http://slsnn.ru/content/files/8229278530.pdfIn PDF document text
- https://obermeyer-modemarkt.de/upload/file/10809164736.pdfIn PDF document text
- http://japan-railpass.info/images/blog//file/wuzuzaduginenuxatanaz.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=all+minor+chords+on+guitarPDF 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_off0001802b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1802B	19108 bytes
SHA-256: `276e31db3468716975e63025df61fb60d79920fb017f695d41a69651990aad80`
`font_01_sfnt_off0001b30b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1B30B	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0001cb22.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1CB22	10764 bytes
SHA-256: `f77d8de526cabda55ac564e172794e299fba765c638155a6d7c00181b0c84c1a`

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