Malicious PDF — malware analysis report

Static analysis result for SHA-256 48408ad84498bd2f…

MALICIOUS

PDF

76.7 KB Created: 2021-03-14 07:17:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: dda24bf5de209f99e3d391d5a1908ff1 SHA-1: afb59cfb4e5383d692245aef6277ae9fa3a52b6c SHA-256: 48408ad84498bd2fcdf59cbc2a6fb6a1a57cf101dbe408c6896e5e52b4eb74f0
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm designed to redirect users to potentially malicious sites. The document contains numerous external links, many hosted on disposable domains, suggesting an attempt to obscure the ultimate destination. The primary lure appears to be a fake technical guide, likely a pretext for phishing or scamming.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 6

  • 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
  • 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://maypoin.ru/aws?utm_term=how+to+fix+tv+remote+control PDF link annotation
    • https://rulotukipaka.weebly.com/uploads/1/3/0/7/130776525/9390804.pdfIn PDF document text
    • http://rodsfish.club/4277439924241w3f.pdfIn PDF document text
    • http://muzhskoizhurnal.ru/19124684599shztm.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453144/normal_5feb661e66ce0.pdfIn PDF document text
    • http://justamorem.com/zombie_original_recipe46ebn.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370529/normal_5fd0f63059527.pdfIn PDF document text
    • https://wovegusokab.weebly.com/uploads/1/3/4/8/134850220/lajaga.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443325/normal_6040d6ba7c42f.pdfIn PDF document text
    • http://igme.site/jabenw8fxz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393639/normal_5fe6e39e8db7c.pdfIn PDF document text
    • https://tabupuja.weebly.com/uploads/1/3/4/6/134647436/poporaresefepi.pdfIn PDF document text
    • https://jikajulimag.weebly.com/uploads/1/3/4/3/134319013/3e65f36ad7f.pdfIn PDF document text
    • http://tranquils.space/77833292884o5xyk.pdfIn PDF document text
    • http://jiropumewumavit.iblogger.org/gudulaga.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464724/normal_600e62e8643e5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://9e2b3e3a-6a02-4d3b-8ba9-5acc01041672.filesusr.com/ugd/66c878_32912386bc8a42fa97d3f627b0c45958.pdf?index=trueIn PDF document text
    • https://d19688e0-347f-4d9d-8cb3-d47c6e049f3d.filesusr.com/ugd/c618e9_22493717205543a5b63ee6d9f6e983ee.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/29da1163-eb6f-4b2a-9369-1884ea9caf57/28948716561.pdfIn PDF document text
    • https://fd7a53fe-11c1-4e60-83ad-ac1bb997268f.filesusr.com/ugd/5cf23b_22b62c5f7a594709ae5c5c58b3c40dfd.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9660bf2-bf4f-47c3-b94b-7ccf7af6545a/madden_20_strategy_guide_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d6c6fc5-08cb-4eb6-b136-06b02ab19ad2/dave_ramsey_monthly_budget_app.pdfIn PDF document text
    • http://mojajigutomikew.rf.gd/easter_bunnies_images_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44b40dc9-eb16-437e-9520-ef7077ebc90f/75431016189.pdfIn PDF document text
    • http://rosaboz.rf.gd/48132824958.pdfIn PDF document text
    • http://jasixerebav.epizy.com/wolevixe.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2BE 4608 bytes
SHA-256: d720532c61c8a8720a5a55648affa0d39c861618a234b1ac42e5fffac3652207
font_01_sfnt_off0000f25b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF25B 10644 bytes
SHA-256: 650a6fbbc2078a44ed3e914c87b0b2f9eb756b3e4d8c11fc7949ec248e8b4a7e
font_02_sfnt_off000116cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116CB 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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