Malicious PDF — malware analysis report

Static analysis result for SHA-256 c54e35f710c0fdb9…

MALICIOUS

PDF

83.2 KB Created: 2021-09-17 20:12:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-25
MD5: 6fdced8699450d5a0479e84ca7daf85e SHA-1: 860718bfde8e7abe136f51d277490b8c53ee207d SHA-256: c54e35f710c0fdb961849966d5341dd4475d45100629c205719dab76d6e0c2d8
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fc7c894afa---lujudigipojuv.pdf In PDF document text
    • https://gulf-rope.com/images/bulk_images/files/tupukoj.pdfIn PDF document text
    • http://doingthing.com/downloads/blog/geust/files/18498035385.pdfIn PDF document text
    • http://ore-processing.ru/d/files/68308183746.pdfIn PDF document text
    • https://workinhotel.com/upload/fckfile/21528810119.pdfIn PDF document text
    • https://gizaviation.com/uploads/files/36204278263.pdfIn PDF document text
    • https://vinadesigndanang.vn/uploads/image/files/wowefuwilubigoruvupaw.pdfIn PDF document text
    • http://flemingdecal.com/uploads/assets/file/27450221425.pdfIn PDF document text
    • http://nenorm.com/files/files/15350534850.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f4fa7a7bee---72943265227.pdfIn PDF document text
    • https://majubesar.info/contents/files/65504562234.pdfIn PDF document text
    • https://mattress-leader.com/media/lizovefidibexilepixiz.pdfIn PDF document text
    • https://bselink.com/userfiles/file/fobowexofununa.pdfIn PDF document text
    • http://koreaticketland.com/userfile/file/worilukipegapebedi.pdfIn PDF document text
    • http://diplomat2014.ru/ckfinder/userfiles/files/xidexiki.pdfIn PDF document text
    • https://www.almuhja.com/ckfinder/userfiles/files/34908197433.pdfIn PDF document text
    • http://mutitar.com/user_img/files/rigidejasugokej.pdfIn PDF document text
    • http://agppi99.pretty-match.com/upload/files/60980545848.pdfIn PDF document text
    • http://chatyzvule.cz/uploads/37353113967.pdfIn PDF document text
    • http://industra.sk/userfiles/file/mabovojufavixit.pdfIn PDF document text
    • http://fatfailogistics.com/fckeditor/files/file/zidasawon.pdfIn PDF document text
    • http://fairway.cc/images/blog/file/waxako.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=juegos+predeportivos+pdfPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD49 19488 bytes
SHA-256: 764399f042d0914555a6339fa2bc71ad749ad75cf56cdbc01b1ca7746b70cd40
font_01_sfnt_off00010f1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F1E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012735.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12735 10516 bytes
SHA-256: d6acf87122e2744fbdee2f26f2094e22f08b77c05b48ef93491a5552359c6f2c

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