Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b7c67eb0466ae6c…

MALICIOUS

PDF

80.6 KB Created: 2021-04-23 04:40:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: dc44965d76963ae4230ce63e2ef62562 SHA-1: eb1925afffc76ceb1a5efa711593d30c645fa485 SHA-256: 5b7c67eb0466ae6cf302e093a530cea348321f60b3b3a8faa9349699d5d86700
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 5

  • 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.
  • 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=nordyne+gas+furnace PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4481667/normal_600d2b9985e61.pdfIn PDF document text
    • https://zuveravovizopow.weebly.com/uploads/1/3/0/9/130969477/ac0581928b5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451551/normal_6002f8dfb4b2e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490953/normal_602b775668b9c.pdfIn PDF document text
    • https://xivetebutago.weebly.com/uploads/1/3/4/7/134737957/bunilizotenur.pdfIn PDF document text
    • https://dawipufa.weebly.com/uploads/1/3/3/9/133986453/5972735.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380230/normal_5fe4b6a387c02.pdfIn PDF document text
    • https://xaporavuxeboj.weebly.com/uploads/1/3/2/6/132695407/bafomonil.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385614/normal_5fee947a748a3.pdfIn PDF document text
    • https://xesinuvukuwufo.weebly.com/uploads/1/3/0/7/130776104/korizojuve.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375885/normal_60283f7c33e01.pdfIn PDF document text
    • https://sesuzefodapu.weebly.com/uploads/1/3/2/8/132815176/c7eaa138f8a2b.pdfIn PDF document text
    • https://sebumeganajili.weebly.com/uploads/1/3/0/8/130874272/zuwitubatumutobox.pdfIn PDF document text
    • https://kasababafaraw.weebly.com/uploads/1/3/5/3/135336348/rinoxedasakolef.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480393/normal_5fca0757be3c8.pdfIn PDF document text
    • https://bebabigi.weebly.com/uploads/1/3/5/9/135977904/xitev-wabodafezamexa-ponovixojozuter-jikesugudogofeb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388065/normal_5ff7d5b732355.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405437/normal_5ff347ea3b4d7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/611ae521-e760-401e-9585-452634178dab/39614515280.pdfIn PDF document text
    • https://s3.amazonaws.com/lonozote/sukeditib.pdfIn PDF document text
    • https://s3.amazonaws.com/kudufigunabi/94041333371.pdfIn PDF document text
    • https://s3.amazonaws.com/mujevubutukoxu/murdoch_mysteries_imdb_parents_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64ed5a3c-0daa-4070-b2be-8b555cce6276/mekilajebadujonemox.pdfIn PDF document text
    • https://s3.amazonaws.com/sazomo/asphalt_8_trainer_3._5._0j_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/tubukeganuji/ishmael_daniel_quinn_quotes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9964413b-0cac-4023-b810-ed0199951bb9/puderuvuju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/437069a2-9c40-48ec-a068-5c2a937c54be/optimate_4_dual_bmw_canbus.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_off0000fd60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD60 5228 bytes
SHA-256: e88510bb359777fde27659ca20dbf3fcc8b1cb7a39b1ad382a630467bc4feda7
font_01_sfnt_off00010f49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F49 11020 bytes
SHA-256: 9843e469f2fd5d5aaba522dc51ec6c98e0305f548ce81cb16bc08c3bb9ce2b04