Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a2c5e20f27d750d…

MALICIOUS

PDF

88.8 KB Created: 2021-09-08 21:08:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-03
MD5: e76b8acac8729d44656100a47884a12d SHA-1: 5ff31555f53029f10f7aee19f7e66833328cf545 SHA-256: 2a2c5e20f27d750de988ff9d55ab1cf16babbfe93cfd9531d14b630d4c80e191
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external links, many pointing to compromised CMS upload directories or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of PDF-specific heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' reinforces this assessment. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://allytemp.ru/uplcv?utm_term=mla+referencing+guide+pdf PDF link annotation
    • http://auto4-spb.ru/public/images/ckfinder/files/83039604856.pdfIn PDF document text
    • http://apluskleaning.com/admin/images/file/51625582825.pdfIn PDF document text
    • http://www.sec-ollivier-associes.fr/www/upload/file/vapovizef.pdfIn PDF document text
    • http://insei.eu/userfiles/files/wotakoxakosolatowuka.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131bb573825b---31256873228.pdfIn PDF document text
    • http://basse-normandie.annuaire-regional.com/ckfinder/userfiles/files/geferatawozatu.pdfIn PDF document text
    • https://resttour.com/images/userfiles/files/37049695688.pdfIn PDF document text
    • https://cabsfromheathrow.com/userfiles/file/matozesuravotalumi.pdfIn PDF document text
    • http://arunimaflavours.com/userfiles/file/xaxufirizilidanirixepek.pdfIn PDF document text
    • http://studioriggio.it/userfiles/files/saxopepaj.pdfIn PDF document text
    • http://bennett-legal.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/10366033505.pdfIn PDF document text
    • http://ricoconsultingattorney.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/707603156.pdfIn PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/7e3804685d65e500f7bb9e40897cc51c/kuxopupewimenatejajax.pdfIn PDF document text
    • https://path.mn/userfiles/files/venibavarapepa.pdfIn PDF document text
    • http://dep14kirov.ru/userfiles/file/lojed.pdfIn PDF document text
    • http://www.advancedevents.ro/wp-content/plugins/formcraft/file-upload/server/content/files/161340d73c84c2---89191932034.pdfIn PDF document text
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161377cc8e18b4---14636696165.pdfIn PDF document text
    • https://www.unicodesystems.com/wp-content/plugins/super-forms/uploads/php/files/fvno08suik5ouu0ad51oa9v9p2/19176508454.pdfIn PDF document text
    • http://kubak-ubezpieczenia.pl/userfiles/file/tobifekesudawuxiv.pdfIn PDF document text
    • http://tomekorea.com/userData/board/file/bekov.pdfIn PDF document text
    • http://ana-jsc.com/upload/files/46203478846.pdfIn PDF document text
    • http://oiseau-bleu-morzine.com/userfiles/file/jibuxipugujidenuwawenetum.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_off0000f4d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4D6 19020 bytes
SHA-256: 85e1dad2835c38c12b00b07db28915272cfdafcf5aee16b2831f5431aa7621b9
font_01_sfnt_off00012610.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12610 10500 bytes
SHA-256: 9b1efb1729638de5d4ee507a978673f761256b068338ad526700c58bfbbd98aa
font_02_sfnt_off00013dcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DCB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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