Malicious PDF — malware analysis report

Static analysis result for SHA-256 862464531b5c4655…

MALICIOUS

PDF

81.3 KB Created: 2021-02-28 06:00:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 6f5536e3e9f8bcce2180906a65834000 SHA-1: c0a27297e45e812be60c4ea5c89e8d331c939769 SHA-256: 862464531b5c4655a50f7c2918545a544a2f3cb0ded3e653a8fba88058d044bb
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or redirection scheme. The primary URL, 'https://vilenefex.ru/strik?utm_term=asmaul+husna+dan+artinya+lengkap+99+word', appears to be a lure, potentially leading to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://vilenefex.ru/strik?utm_term=asmaul+husna+dan+artinya+lengkap+99+word PDF link annotation
    • https://letotanuvimipe.weebly.com/uploads/1/3/4/5/134598603/jedipoxipu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495385/normal_5fd12630c35e4.pdfIn PDF document text
    • https://kijomexed.weebly.com/uploads/1/3/1/0/131069838/4772131.pdfIn PDF document text
    • https://gawotajar.weebly.com/uploads/1/3/4/5/134525297/f7328e.pdfIn PDF document text
    • https://fukoxifixe.weebly.com/uploads/1/3/4/4/134460993/menexesafozim_zofutuze.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446651/normal_6016626d214c0.pdfIn PDF document text
    • https://bitigufej.weebly.com/uploads/1/3/5/3/135337089/sariwuri.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378848/normal_5fc87e6d53d88.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466398/normal_5fd123cea2e21.pdfIn PDF document text
    • https://zasiranel.weebly.com/uploads/1/3/4/5/134507270/pofil.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420029/normal_6011d7d492517.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413111/normal_5ffebaab97fbf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383132/normal_60241121c9991.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://s3.amazonaws.com/mexijegedakol/mebudamabudolanoj.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dae3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAE3 5660 bytes
SHA-256: 8d8452e305648e1a8f0ae8989103ced7824daa860ccd5fc6547221139404ffa9
font_01_sfnt_off0000ee09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE09 10944 bytes
SHA-256: ca7f7d160da33421daf234f6b4ea745848cc059711050d40c2fa0596d95bee3f
font_02_sfnt_off00011255.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11255 16584 bytes
SHA-256: 940cf132ddcdf9a5d8e0b275b1795df0347eca7ae97eb9bf59a519fdd11b804f
font_03_sfnt_off00012930.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12930 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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