Malicious PDF — malware analysis report

Static analysis result for SHA-256 9801962aa7e7a008…

MALICIOUS

PDF

63.7 KB Created: 2021-05-23 03:49:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 3cc85f68246e11435d981ca875d2b5b2 SHA-1: 7f0a5c995e67d366d4115653950ea2226ca3d403 SHA-256: 9801962aa7e7a00869a983c2017ca7d8f981d159b035eccc0ac4b4f8d5baa29c
184 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The embedded content, though heavily obfuscated, appears to be related to a soundtrack download lure. The ClamAV detection and ML heuristic confirm its malicious nature, likely serving as a dropper or redirector to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8428

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.
  • 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
  • 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://baarspo.ru/strik?utm_term=twilight+new+moon+soundtrack+mp3+download PDF link annotation
    • https://zuzigiwasozobe.weebly.com/uploads/1/3/4/6/134676944/98c542e27b.pdfIn PDF document text
    • https://ditufanavuj.weebly.com/uploads/1/3/0/7/130738569/6956736.pdfIn PDF document text
    • https://lipijunozawisek.weebly.com/uploads/1/3/4/7/134721324/minugopojel.pdfIn PDF document text
    • https://kutepuwabaluv.weebly.com/uploads/1/3/2/6/132681670/kagozapuro.pdfIn PDF document text
    • https://naxovemunozi.weebly.com/uploads/1/3/5/9/135958864/pexeb_lerosiwupivike_govujajoxikoge.pdfIn PDF document text
    • https://vinofuloro.weebly.com/uploads/1/3/4/8/134850824/jetaxovakew.pdfIn PDF document text
    • https://vobawele.weebly.com/uploads/1/3/5/3/135334277/derafujifobek.pdfIn PDF document text
    • https://pelabomorifij.weebly.com/uploads/1/3/4/6/134628360/3172623.pdfIn PDF document text
    • https://bepupoxusiboma.weebly.com/uploads/1/3/4/8/134847186/riruwevupufutaga.pdfIn PDF document text
    • https://roromitekavu.weebly.com/uploads/1/3/4/5/134528712/b0628b.pdfIn PDF document text
    • https://vigodabazo.weebly.com/uploads/1/3/4/8/134872933/9235803abb0a.pdfIn PDF document text
    • https://xogosikeduvad.weebly.com/uploads/1/3/4/6/134669078/jutevej.pdfIn PDF document text
    • https://felinabaf.weebly.com/uploads/1/3/4/3/134380667/tisofimis_bowologokuwo_wuxir.pdfIn PDF document text
    • https://sezibuginodeso.weebly.com/uploads/1/3/4/4/134470526/104788.pdfIn PDF document text
    • https://winiwezunubesu.weebly.com/uploads/1/3/1/3/131379740/7918881.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/049c8e4e-4f64-4554-ba63-cb13a07fd4ea/what_is_conclusion_in_philosophy_and_logic.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2962b73f-8c96-49f2-abf1-f42e532f65c0/misixu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49c58ffc-c84f-47f6-a6be-5fc242b75d36/63573741345.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5921c8e0-b22a-4196-b883-80bd78b89a48/nuzugoparotanivub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be5718ec-32f4-424d-b992-df9b3b424c1b/nenapitikumudog.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_off0000e039.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE039 5756 bytes
SHA-256: 963a397143ba706c44bbbd90c2304543dd6552814627bc548cc67a2cea4399cb

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