Malicious PDF — malware analysis report

Static analysis result for SHA-256 f23fb9826745e031…

MALICIOUS

PDF

75.9 KB Created: 2021-02-25 20:25:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 9ffb914a9be6794f163521b035a4520b SHA-1: e6b72036fd566143400241e8fb4b95442b7f0253 SHA-256: f23fb9826745e0319f8a5a76593a267904a4b4eb58b4b9ec3c27560c6202da69
186 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 0.9998

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.
  • 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://seumenha.ru/wix?keyword=hk+audio+deacon+manual PDF link annotation
    • https://xakediripikevul.weebly.com/uploads/1/3/4/3/134338645/xuxubinofukutes.pdfIn PDF document text
    • https://veminimuvaw.weebly.com/uploads/1/3/4/6/134630651/9ca8700.pdfIn PDF document text
    • https://likuwiwekadu.weebly.com/uploads/1/3/1/8/131857000/xokow.pdfIn PDF document text
    • https://furadigiwib.weebly.com/uploads/1/3/1/4/131407367/66d95322af045f.pdfIn PDF document text
    • https://bunavomotuta.weebly.com/uploads/1/3/4/6/134606544/4172383.pdfIn PDF document text
    • https://madaremowigefin.weebly.com/uploads/1/3/2/6/132681361/kutezaledizud.pdfIn PDF document text
    • https://ninobajoxakatud.weebly.com/uploads/1/3/4/7/134702009/2753252.pdfIn PDF document text
    • http://dajexori.mypressonline.com/how_to_fix_a_clogged_badger_5_garbage_disposal.pdfIn PDF document text
    • https://bigogewoxof.weebly.com/uploads/1/3/0/7/130739615/lusetoro_lijufazuxexuba.pdfIn PDF document text
    • https://vuxamirajuka.weebly.com/uploads/1/3/6/0/136082549/1dffe3b2cf71a8f.pdfIn PDF document text
    • https://nojufetabug.weebly.com/uploads/1/3/4/7/134748112/2191719.pdfIn PDF document text
    • https://wajizewikibi.weebly.com/uploads/1/3/5/3/135326478/pelumarexav-kifopi.pdfIn PDF document text
    • https://jetijejage.weebly.com/uploads/1/3/4/3/134319548/bapavopujiv_fomofixazav_zuxidadezogef.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/mamibis/fopofigowasevimavuwojor.pdfIn PDF document text
    • https://s3.amazonaws.com/genedesowul/74382714109.pdfIn PDF document text
    • http://wotidupodugi.myartsonline.com/xikovitifapolefigilo.pdfIn PDF document text
    • https://s3.amazonaws.com/zetituri/zotajunaxolabodoxav.pdfIn PDF document text
    • http://fubavinexazixo.onlinewebshop.net/are_vox_amps_good.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4AE 4836 bytes
SHA-256: 69844528e2b859aa3d38a6099efc8e6b19aa37b624270ab5b37b8da623c12185
font_01_sfnt_off0000f510.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF510 14432 bytes
SHA-256: 6c5152aee04b844683a9e58c2c776b0ec32047351fe00c05c0db3e393076beaf

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