Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbf4df1c29e254d8…

MALICIOUS

PDF

84.8 KB Created: 2021-08-07 02:04:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 5d8b194f29c13f87b6c161dc5d930497 SHA-1: 93a216691297eb02252ebc2fecf4347319bc24fc SHA-256: bbf4df1c29e254d8ce2dcdb035802cd3eecda170514a7cbf5497a139bc77a5e5
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and a large number of external links, many hosted on compromised websites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a link farm strategy, suggesting the document is designed to drive traffic to potentially malicious or phishing sites. The embedded JavaScript likely facilitates the redirection or further malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://queure.ru/uplcv?utm_term=where+is+the+alternator+on+a+2012+dodge+avenger PDF link annotation
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609902687f28e---menupupuzodasi.pdfIn PDF document text
    • https://ever-progress.com/upload/files/58366455743.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf777194ac2---dumirutatamusuzes.pdfIn PDF document text
    • https://foodsafebox.com/ckfinder/userfiles/files/32727106533.pdfIn PDF document text
    • https://specialbrands.gr/wp-content/plugins/super-forms/uploads/php/files/6757fab6432dd5f29d958a850853c23b/84469842283.pdfIn PDF document text
    • http://rgjbreunion.com/clients/6/69/6950e03db8b1ea894755b369f0a03c31/File/53140423894.pdfIn PDF document text
    • https://monographie.com/ckfinder/userfiles/files/49517647091.pdfIn PDF document text
    • http://westtech1963.com/clients/d/d4/d4250bc21dcbbf02d7f9bc68df143add/File/8516929109.pdfIn PDF document text
    • http://market-oborudovanie.ru/upload/file/5055502603.pdfIn PDF document text
    • http://orchid-daikanyama.com/userfiles/file/76760269791.pdfIn PDF document text
    • https://www.saammohaseb.ir/wp-content/plugins/super-forms/uploads/php/files/1519052fd5b5ee558ced52e1c2092c0f/95192679425.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0370876413---66642619104.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/e1c6df5801e81b969fb7201f5bdba9c4/47232333882.pdfIn PDF document text
    • https://mrmobilewebsite.agency/wp-content/plugins/super-forms/uploads/php/files/fd02ccfba20bec9a67a204f26fde0768/gibevizibunatiju.pdfIn PDF document text
    • http://travelshops.pl/userfiles/file/valimitaxevolejukojo.pdfIn PDF document text
    • https://www.temsilcifirsatlari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608046bb16f8b---90816647886.pdfIn PDF document text
    • http://nowyhotelik.pl/userfiles/file/49546386155.pdfIn PDF document text
    • http://raczcsalad.hu/files/nimetamobegamowapive.pdfIn PDF document text
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/2cagiqeevt6se4bkud1j3ih5fv/zururironilutizowerig.pdfIn PDF document text
    • http://thestarbusan.net/FileData/ckfinder/files/20210624_C52E8289C87BE2F4.pdfIn PDF document text
    • https://minervatech.work/js/ckfinder/userfiles/files/wuwuserutosilazowavekirej.pdfIn PDF document text
    • https://bbpartner.cz/userfiles/file/88577562267.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f3850a2c29a---92342535911.pdfIn PDF document text
    • 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.

FilenameKindSourceSize
font_00_sfnt_off0000e4a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4A6 17068 bytes
SHA-256: 6738fe68fd2ece21b67ddaf39ea4b6d611504da4f8e5bd4659b19b27a8004368
font_01_sfnt_off00011122.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11122 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012939.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12939 10880 bytes
SHA-256: e569029c47689b64d352603c9792ebe56d0d8a1b400b3316f84ff0b9e44c6c0f

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