Malicious PDF — malware analysis report

Static analysis result for SHA-256 501de3d7d18cb72f…

MALICIOUS

PDF

69.3 KB Created: 2021-01-10 03:17:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 0b344aee4b38a16b8d1409b1fb45341b SHA-1: b17cd74bd3233f71fc7dae1e6af300c0ae5b61c1 SHA-256: 501de3d7d18cb72fc2db194b69644ed3fe78c676a878e9b2ec361321e295f31b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 0.9998

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://trafftec.ru/123?utm_term=delonghi+toaster+oven+broiler PDF link annotation
    • https://zatikavetix.weebly.com/uploads/1/3/2/3/132303242/wajanibajugipo.pdfIn PDF document text
    • https://pafolerasakuj.weebly.com/uploads/1/3/1/4/131438226/8654189.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368997/normal_5f8f5793cc6b2.pdfIn PDF document text
    • https://site-1180493.mozfiles.com/files/1180493/offroad_jeep_prado_driving_mod_apk.pdfIn PDF document text
    • https://site-1172709.mozfiles.com/files/1172709/tizoripezamejariv.pdfIn PDF document text
    • https://site-1174729.mozfiles.com/files/1174729/stickman_arrow_archer_fight_download.pdfIn PDF document text
    • https://site-1166647.mozfiles.com/files/1166647/rosizit.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jufowokedunod/program_a_rc73_remote_manually.pdfIn PDF document text
    • https://s3.amazonaws.com/wogikokuzotaxa/alkaline_diet_recipe_book_download.pdfIn PDF document text
    • https://s3.amazonaws.com/bokofapig/41687535231.pdfIn PDF document text
    • https://s3.amazonaws.com/sizabo/91412624991.pdfIn PDF document text
    • https://s3.amazonaws.com/woxewiwupir/56904709827.pdfIn PDF document text
    • https://s3.amazonaws.com/wuxupewu/77724390622.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d2e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2E0 5148 bytes
SHA-256: 44df0c46650fbb5343c0bf9578c98cbcfe23584920920a4b3fda158d873d6671
font_01_sfnt_off0000e465.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE465 10504 bytes
SHA-256: aa71b5255f24a8d4cb80b15df798398a8955a7512de0d378c6fbbd3129d48f2b