Malicious PDF — malware analysis report

Static analysis result for SHA-256 3347f958b75a00a1…

MALICIOUS

PDF

79.0 KB Created: 2021-05-21 11:36:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: ba4b3f88ee5cda466351f5f58a43afbc SHA-1: d7f794508d33bc5748ca2b0e474b54d49d8cace1 SHA-256: 3347f958b75a00a1f6cf10be1492b53203560490f0e75fbc7fe40e141bed8c23
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9996

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://soxebez.ru/strik?utm_term=filmywap+south+movie+2019+latest+hindi+dubbed PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4470698/normal_6033ab6926d21.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497346/normal_60338df226b33.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478398/normal_5fd89ae5179db.pdfIn PDF document text
    • https://putesoborufo.weebly.com/uploads/1/3/0/8/130814126/2815583.pdfIn PDF document text
    • https://fafefojesuvun.weebly.com/uploads/1/3/4/6/134651362/3653025.pdfIn PDF document text
    • https://nuxikete.weebly.com/uploads/1/3/3/9/133997556/kefetidari.pdfIn PDF document text
    • https://kunolutupevuj.weebly.com/uploads/1/3/4/7/134772201/xonenu_zabufunuvawu_bizuvafitam_woxibaniw.pdfIn PDF document text
    • https://lisiruzefixa.weebly.com/uploads/1/3/4/4/134495270/molegitozu-rajukix.pdfIn PDF document text
    • https://tavifarexup.weebly.com/uploads/1/3/4/6/134611028/211435.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403808/normal_5ff4436ff306a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373304/normal_603350d46a4c5.pdfIn PDF document text
    • https://paboripiniw.weebly.com/uploads/1/3/0/7/130739049/8e8b346d264851.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/sixenogafopoj/the_twilight_saga_2013_filmyzilla.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37120f31-2b1a-4e19-ae15-11d3328bec1b/didaxovib.pdfIn PDF document text
    • https://s3.amazonaws.com/doxifuba/21716214433.pdfIn PDF document text
    • https://s3.amazonaws.com/gorajikunobixi/i_am_affirmations_bible_verses.pdfIn PDF document text
    • https://s3.amazonaws.com/nedijowewoded/39425540861.pdfIn PDF document text
    • https://s3.amazonaws.com/woberiz/factoring_trinomials_worksheet_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/dufekifaral/criticism_of_grammar_translation_method.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxuledo/bsli_vision_life_income_plan.pdfIn PDF document text
    • https://s3.amazonaws.com/ximupuv/17971231370.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5eff93d-75d4-41e0-bf7b-879cebda8fd4/international_law_commission_internship.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_off0000f208.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF208 5932 bytes
SHA-256: d8b1d4ace3d0b7419627fe572bce6d47eb416c5e71b05f46520df9bf50d0b864
font_01_sfnt_off0001062f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1062F 12128 bytes
SHA-256: 6634fe0b096084b68f1a9459c9499077aaee2f0acfad534a41389ff99dfd6b47

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