Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d3b3a7da4fa899e…

MALICIOUS

PDF

83.0 KB Created: 2021-09-09 15:51:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 07a7428583f5bd4b94c5b02a38626d20 SHA-1: 1af2e4124e33a95287d4366e056f72eb48cae5a5 SHA-256: 2d3b3a7da4fa899ea64498d9880366e30bd63b8d94aece4285d8bad3978f86cf
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was identified as malicious by ClamAV and a machine learning classifier, exhibiting characteristics of an advance-fee scam. The document's structure and embedded URLs suggest it is part of a phishing campaign designed to trick users into believing they have won a prize or are due funds, which is a common lure for advance-fee fraud. No scripts were extracted, but the PDF structure and heuristics point to a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://magogaralbamoble.com/galeria/files/41703285389.pdf In PDF document text
    • http://www.lebedosapartotel.com/data/yukle/files/98079327835.pdfIn PDF document text
    • https://trinityautorepairs.com/uploads/files/61191949663.pdfIn PDF document text
    • https://cancelaria.pl/galeria/file/jewiwowosatemalozogonev.pdfIn PDF document text
    • http://vonschickenfremont.com/uploads/files/36650598225.pdfIn PDF document text
    • http://pospatrans.cz/UserFiles/File/jofesuxu.pdfIn PDF document text
    • http://jtipartner.com/ckfinder/userfiles/files/gapavuboroxegaj.pdfIn PDF document text
    • https://mercerapparelss.com/userfiles/files/99076891612.pdfIn PDF document text
    • https://cailux.lu/userfiles/files/tejanekapope.pdfIn PDF document text
    • https://gad-elhak.com/userfiles/file/69228279393.pdfIn PDF document text
    • http://nonstopsushi.com/uploads/files/jexaxebixuzupinawivazi.pdfIn PDF document text
    • http://fs-select.com/images/blog/file/86857614850.pdfIn PDF document text
    • http://2015.letnifestiwal.pl/ckfinder/userfiles/files/69538276969.pdfIn PDF document text
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/34ba4861744a7163a6ecf4bd876c703e/65505435049.pdfIn PDF document text
    • https://testpensija.bankai.lv/ckfinder/userfiles/files/bogapunibovasalo.pdfIn PDF document text
    • http://plantessentialoil.com/upload/files/93854624247.pdfIn PDF document text
    • https://www.babetravelling.com/ckfinder/userfiles2/files/78226740660.pdfIn PDF document text
    • http://vititanon.com/user_img/files/sipamivibojif.pdfIn PDF document text
    • http://tuanayapim.com/rsm/files/89257094658.pdfIn PDF document text
    • http://pushgroup.lv/userfiles/files/83218723377.pdfIn PDF document text
    • http://brothersaluminium.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/1612fdb7d22f83---83553807991.pdfIn PDF document text
    • http://thaimassagemodel.com/ckfinder/userfiles/files/91820350028.pdfIn PDF document text
    • https://mosconi.net/userfiles/file/14511763677.pdfIn PDF document text
    • https://atasuorganiktarim.com/upload/ckfinder/files/46263333489.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=winner+soccer+evo+elite+apkPDF 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.

FilenameKindSourceSize
font_00_sfnt_off0000db30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB30 19576 bytes
SHA-256: dbdfe7aa95f187a2a3df930157f54f5d484a5f2e2b7cf97de717af309e6def2a
font_01_sfnt_off00010de8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DE8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000125ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125FF 10520 bytes
SHA-256: fd48b05e88dc126165ae6e41e7f05b91740bfcfd04ea04d2f576ebc555b7fe1a