Malicious PDF — malware analysis report

Static analysis result for SHA-256 fccac502032192b4…

MALICIOUS

PDF

79.2 KB Created: 2021-05-29 14:28:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 08dbbf179072fe2594277af3a5b3a29c SHA-1: 2b3a048d399a8b6f34c57ed433fe6cf962e1e581 SHA-256: fccac502032192b451f74e008d3f08d1b5490967d7c5e23ced9545adc2a79e6f
186 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or phishing operation. The document body, though heavily obfuscated, contains a question that likely serves as a lure to click on the embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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.
  • 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://xajibur.ru/strik?utm_term=what+is+the+main+reason+that+antinous+wants+to+kill+telemachus PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4479214/normal_5ff8c6f114fe8.pdfIn PDF document text
    • https://tupalewituto.weebly.com/uploads/1/3/2/6/132682563/nosiw_wozotaxazivilep_xeduragesonomum.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420767/normal_60147056d31f4.pdfIn PDF document text
    • https://bifezogutagu.weebly.com/uploads/1/3/4/5/134598372/167650.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369183/normal_6033e3c88bb5e.pdfIn PDF document text
    • https://kagoxikefo.weebly.com/uploads/1/3/4/6/134649289/1a2e9a9a24a7a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374185/normal_604e2d0619ad7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448535/normal_6006b40682dc4.pdfIn PDF document text
    • https://vekeliludodim.weebly.com/uploads/1/3/4/7/134745250/2228449.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420752/normal_6056cef287ae4.pdfIn PDF document text
    • https://wegukovomaf.weebly.com/uploads/1/3/4/8/134865780/3612a8b.pdfIn PDF document text
    • https://libonatelizipo.weebly.com/uploads/1/3/5/3/135326144/693a530cc6539c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446036/normal_6017d3a880b06.pdfIn PDF document text
    • https://lotopunukulel.weebly.com/uploads/1/3/4/4/134473418/lenefumi.pdfIn PDF document text
    • https://funiduned.weebly.com/uploads/1/3/4/7/134773133/5100136.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371514/normal_6065dc301e113.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455672/normal_606d8e9f17a42.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461763/normal_60467603c6d06.pdfIn PDF document text
    • https://wekigenajelu.weebly.com/uploads/1/3/3/9/133999196/kivewafipetejew-toxegoberewo.pdfIn PDF document text
    • https://xuboxale.weebly.com/uploads/1/3/1/4/131452808/1557440.pdfIn PDF document text
    • https://zaluvunikuf.weebly.com/uploads/1/3/1/0/131070459/0718bc60.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
    • 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_off0000eba5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBA5 5092 bytes
SHA-256: f50e3a482543da328ad442fcd08aaffe098aa804653e86ba6b5afde71323bc01
font_01_sfnt_off0000fcdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCDC 10664 bytes
SHA-256: 60f077c1eda0126687e59245336468eff37b9a3d5e45a8efda38f816d24e5fe0
font_02_sfnt_off0001211c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1211C 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3