Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6403d78a01adf78…

MALICIOUS

PDF

67.3 KB Created: 2021-03-21 11:07:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: b4d9049d0028ca5073d2bea398b9dc20 SHA-1: 2036acc2adb441e1d536b6ab4bd16eb78bd44cb7 SHA-256: a6403d78a01adf78c6c41395be23d075f8b0f7f54fcf924ba7272ac712ec3e98
182 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, and contains links to known malicious redirectors. The PDF document itself is heavily obfuscated, but the presence of multiple links to disposable hosting and redirector infrastructure strongly suggests a phishing or malware distribution attempt. No scripts were extracted, but the PDF structure and embedded links are indicative of a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8782

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/wix?keyword=growing+wild+garlic In PDF document text
    • https://static.s123-cdn-static.com/uploads/4449788/normal_5fdfd899dfb73.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451369/normal_5fe783687eb58.pdfIn PDF document text
    • http://maxonona.22web.org/rokitaxepes.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367635/normal_6009d9ee8fe87.pdfIn PDF document text
    • https://jazazigiw.weebly.com/uploads/1/3/1/3/131398077/c8a93a1d2c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482027/normal_60359715216df.pdfIn PDF document text
    • https://rofaxebawo.weebly.com/uploads/1/3/4/7/134750080/dugili-govodamaruku.pdfIn PDF document text
    • https://lozulijulejibog.weebly.com/uploads/1/3/1/8/131857057/wufobaki_febubikizetofa_gigipadaluluzo.pdfIn PDF document text
    • http://zobowodinoto.iblogger.org/40474694109.pdfIn PDF document text
    • https://vovamujif.weebly.com/uploads/1/3/5/3/135318660/lexupox.pdfIn PDF document text
    • https://suzazenesegi.weebly.com/uploads/1/3/0/7/130776168/sawebajefa-mogopexiralo-xikepuwovigena.pdfIn PDF document text
    • https://muragifenujokuf.weebly.com/uploads/1/3/1/1/131164382/tetaxarepiturom.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://podatef.rf.gd/cbse_class_10_maths_sample_papers_2020_cbse._nic._in.pdfIn PDF document text
    • http://jivobolalozula.rf.gd/bilugexifamisujozu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5525c32-9e15-4e2b-aa59-7c16569358c2/how_to_potty_train_baby_in_3_days.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16c6dd2c-67c2-4d20-832b-7634b8b7cb72/redalufonajutonoke.pdfIn PDF document text
    • http://pejaxuvotovu.rf.gd/advanced_english_grammar_book_amazon.pdfIn PDF document text
    • http://riberudedanute.epizy.com/minecraft_pc_1._13._2_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff2255ff-000f-43ab-822f-fc81bec925c7/what_to_eat_after_2_day_detox.pdfIn PDF document text
    • http://xamufalifab.epizy.com/choir_application_letter_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/656ce072-3f10-4c02-b0e8-258bebea792d/sirepufirimugogenobu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a683ffb-46a0-4b68-9cf1-701254f96821/50517214582.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_off0000fcf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCF7 5052 bytes
SHA-256: ecc04eb75be313b8791a4ac476d6400efd6b0ca757f8dca465a9d8b254f1a03b

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