Malicious PDF — malware analysis report

Static analysis result for SHA-256 8edfe70f6a0456dc…

MALICIOUS

PDF

85.2 KB Created: 2021-02-22 22:18:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 6b130b566694b2c3ea9e855ae5eb52be SHA-1: dfc1b8adf31e9b76b3a3de2d12001a43854eaa9e SHA-256: 8edfe70f6a0456dc14191a397831d5b06bf750dd5d87a7ab084c320a0b71f3bd
196 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing or SEO link farm attack. It contains numerous external links, with a critical heuristic identifying a mass external PDF link farm. The document body, though heavily obfuscated, suggests a lure related to 'spotted lanternflies in china', likely a pretext to drive traffic to malicious or spam content. No scripts were extracted, but the presence of numerous external links indicates an attempt to redirect the user to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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://baarspo.ru/strik?utm_term=what+eats+spotted+lanternflies+in+china PDF link annotation
    • https://cdn.sqhk.co/ropobemuma/bt5pzYN/48327979770.pdfIn PDF document text
    • https://tukumexof.weebly.com/uploads/1/3/4/7/134721389/lumonuxojidepabowi.pdfIn PDF document text
    • https://cdn.sqhk.co/vufisolepu/zC3jbv3/49462277699.pdfIn PDF document text
    • https://cdn.sqhk.co/pedidagow/dutotih/momedobekekaba.pdfIn PDF document text
    • https://cdn.sqhk.co/nonuripot/BJ6ighe/backflip_madness_mod_apk_revdl.pdfIn PDF document text
    • https://cdn.sqhk.co/kolokejo/faaojeu/jigusuxuluto.pdfIn PDF document text
    • https://lupilonugugi.weebly.com/uploads/1/3/1/6/131637558/lupagemirufekobolog.pdfIn PDF document text
    • https://cdn.sqhk.co/ligumorik/jija0gi/stick_cricket_super_league_online.pdfIn PDF document text
    • https://toruvorunivigu.weebly.com/uploads/1/3/5/3/135317855/a07ccd2a6120b5.pdfIn PDF document text
    • https://cdn.sqhk.co/bomagomax/diehfh3/6415217765.pdfIn PDF document text
    • https://cdn.sqhk.co/goxobuve/UgfgO3f/dezusinazedaresifogelugo.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/rebomedug/lituzejikuwuditakipezog.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_off00010cc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CC9 5256 bytes
SHA-256: 82ecc88c6c8378bb129633cde0cf005d73019601f9f4c7931753a954fff48389
font_01_sfnt_off00011eb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EB1 12780 bytes
SHA-256: 2f90bea631bc3667d28e961e7775b5084e3d15b5fda008f8c054ba76539db1c9

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