Malicious PDF — malware analysis report

Static analysis result for SHA-256 b621c389355e46af…

MALICIOUS

PDF

66.6 KB Created: 2021-01-26 13:17:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: c73ce69f03f0eb12db50918b3fae38b4 SHA-1: d3a57dcc41b63dc001c78f0662d86f4e3b1781e4 SHA-256: b621c389355e46af476457a0712f4f550865d44dccdda63955a68b930718dda0
134 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it's a phishing lure, specifically using an image to redirect users to an external URL. The ML classifier and ClamAV detection further support its malicious nature. The primary IOC is the redirector URL, which is likely used to host a phishing page or distribute further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8429

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffi.ru/aws?utm_term=azithromycin+100+mg+informacion+en+espanol PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4420767/normal_600b5360bf5e6.pdfIn PDF document text
    • http://thepropheticapp.com/57082604033kiusw.pdfIn PDF document text
    • http://rukozhop-guide.com/96472534314w9vbc.pdfIn PDF document text
    • https://fetezubusob.weebly.com/uploads/1/3/2/6/132681625/dorugukikagixo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427295/normal_5fdda2d225c5e.pdfIn PDF document text
    • http://kufolalat.iblogger.org/xobenimudagomimapudulo.pdfIn PDF document text
    • http://toppiksnack.xyz/airbnb_login_issues2en76.pdfIn PDF document text
    • http://gsmall.space/72981254601z1p5l.pdfIn PDF document text
    • http://dekagexagupeje.iblogger.org/18159366174.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484364/normal_5ffd9ed0056de.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/tawosutosuxi/carboxylic_acids_naming_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/fezenur/mastermind_use_of_english_answers_online.pdfIn PDF document text
    • http://xevunikusixed.rf.gd/95338916540.pdfIn PDF document text
    • https://s3.amazonaws.com/wupiwupiwot/filmywap_movies_2018_free.pdfIn PDF document text
    • http://jutefuzu.rf.gd/cryptic_quiz_answer_key_page_42.pdfIn PDF document text
    • http://dibulazovila.rf.gd/wordly_wise_book_6_lesson_1_answers.pdfIn PDF document text
    • http://suvapik.epizy.com/6800051793.pdfIn PDF document text
    • https://s3.amazonaws.com/jaloto/11507336707.pdfIn PDF document text
    • http://fasokefukolu.epizy.com/nobepadidabedewo.pdfIn PDF document text
    • http://sawozepanoludib.rf.gd/73049131323.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2AC 5764 bytes
SHA-256: 571e8afba891501ffb4de9cffd12e5a44e158204c5278235162d5db1edb639ac