Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d97dd686c141d0a…

MALICIOUS

PDF

88.8 KB Created: 2021-02-15 01:00:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 0fa5ed709f6c634dcb23e3ae5d2c0906 SHA-1: ce126cabd94df0fb5db50d0ecafa20b2ecf9d3ea SHA-256: 7d97dd686c141d0a70332443a649fd34f688cbe1ac6d842b4b983b3efab6bcbf
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document is flagged as malicious by multiple heuristics and a machine learning classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, with at least one pointing to known malicious redirector infrastructure. The document appears to be a link farm designed to distribute malicious content or phish users.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/123?utm_term=patriots+james+wesley+rawles+pdf In PDF document text
    • https://dozevexenunapaf.weebly.com/uploads/1/3/4/0/134017655/ridetateditapuv.pdfIn PDF document text
    • https://gitufigekuxos.weebly.com/uploads/1/3/4/6/134634758/5914064.pdfIn PDF document text
    • https://pitazifuriza.weebly.com/uploads/1/3/0/9/130969431/936177.pdfIn PDF document text
    • https://cdn.sqhk.co/wujamufaw/hbhdUkd/92843353748.pdfIn PDF document text
    • https://fulotetaputu.weebly.com/uploads/1/3/2/7/132740707/nasilojew.pdfIn PDF document text
    • https://tagopebarezixog.weebly.com/uploads/1/3/1/6/131607889/jikego_japabuben.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447906/normal_5ff4a5a45fded.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367656/normal_5ffec0ae9f62e.pdfIn PDF document text
    • https://cdn.sqhk.co/kawonidoza/VLajeha/my_talking_cat.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418570/normal_5fd7e9a8b89f9.pdfIn PDF document text
    • https://getiwojaxewife.weebly.com/uploads/1/3/4/0/134012456/f135547cf45c0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378153/normal_5feb35d2ebb39.pdfIn PDF document text
    • https://cdn.sqhk.co/kixarozikej/Tjfjchc/paralyzed_nf_chords_piano.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368977/normal_60282976152d0.pdfIn PDF document text
    • https://cdn.sqhk.co/pujixefan/eqjbDgc/36949897244.pdfIn PDF document text
    • https://cdn.sqhk.co/jisaside/cih7Fhc/87238190496.pdfIn PDF document text
    • https://nodirodenesubob.weebly.com/uploads/1/3/5/9/135986245/gobifudexe.pdfIn PDF document text
    • https://cdn.sqhk.co/karadirimose/gjhhnwP/easy_auto_clicker_2._0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zerujafulo.rf.gd/1559050774.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_off00011c1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C1E 5456 bytes
SHA-256: 0c0633ea69cce2e6143520efb15380a6fc228162fd237fbaddd34aaf18786b50
font_01_sfnt_off00012eae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EAE 11936 bytes
SHA-256: e1c5abecc348b91244d131505c7ffa3103d4bcc786d6fd891f5cfd8fabb498cc

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