Malicious PDF — malware analysis report

Static analysis result for SHA-256 10f004a495c5f70e…

MALICIOUS

PDF

79.2 KB Created: 2021-05-07 19:15:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 17e97c9fbd65aaf560fd8973334dbe7a SHA-1: 5072241954e0c071cad879d3cf4eaac861117b7b SHA-256: 10f004a495c5f70eafaba7b6ac30c77473f409705ef0eca99332eb273a21f4dc
186 Risk Score

Malware Insights

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

This PDF was flagged as malicious by both ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, containing numerous external links, with a primary URL pointing to a suspicious domain. The presence of many links on disposable hosting services further supports a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 6

  • 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.
  • 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://resalured.ru/strik?utm_term=pyramid+principle+slideshare PDF link annotation
    • https://zavurebugefogoj.weebly.com/uploads/1/3/4/3/134397626/5b2add53.pdfIn PDF document text
    • https://zimuroxojirewun.weebly.com/uploads/1/3/1/4/131407818/24ede60e518f.pdfIn PDF document text
    • https://fazajamol.weebly.com/uploads/1/3/2/7/132740605/9468525.pdfIn PDF document text
    • https://kibidabusiben.weebly.com/uploads/1/3/1/0/131070702/1977711.pdfIn PDF document text
    • https://gudaxukusakirip.weebly.com/uploads/1/3/4/0/134096244/baae54d5a77.pdfIn PDF document text
    • https://didunomupipopad.weebly.com/uploads/1/3/1/4/131438203/fa2addbd5540.pdfIn PDF document text
    • https://levapexufusetij.weebly.com/uploads/1/3/4/9/134904519/kepuneninisu_niwadaverazus.pdfIn PDF document text
    • https://munuteme.weebly.com/uploads/1/3/4/8/134862418/xosisufasuxujowi.pdfIn PDF document text
    • http://ig-copyrightnoticehelp.com/35427956142uvrei.pdfIn PDF document text
    • http://verifybadgesbusiness.com/futodaralodizozabewiwatibr8eqp.pdfIn PDF document text
    • https://takigufumugo.weebly.com/uploads/1/3/5/3/135345847/sagamisof.pdfIn PDF document text
    • http://study-english-02.space/31364644787996rh.pdfIn PDF document text
    • https://voselorijovun.weebly.com/uploads/1/3/4/0/134041736/5344500.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/tetofamuxulil/88223338756.pdfIn PDF document text
    • https://2e03c77f-99cc-4591-9807-54d8d49c9ce6.filesusr.com/ugd/759733_b288cc9cf28a4c0aa9f51ddaaa1e128c.pdf?index=trueIn PDF document text
    • https://37bdae34-bb2f-403f-997c-54a7c09d9c06.filesusr.com/ugd/dc98cc_172db10336b04748afe60bc538d74ac9.pdf?index=trueIn PDF document text
    • https://6674166f-eb58-46b1-9d38-a528bc95e02c.filesusr.com/ugd/e38d8e_b39e2e03b18741ed8ffebb1af0565f8d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xovekolamoxe/rinejepatamo.pdfIn PDF document text
    • https://s3.amazonaws.com/xijuxosisomuna/gofalinowi.pdfIn PDF document text
    • https://s3.amazonaws.com/vonuxagupeduze/19542524793.pdfIn PDF document text
    • https://04934832-22f3-474e-96de-b9d593e92251.filesusr.com/ugd/f390e7_0bab6c7ead784f05b312fd841a4c1451.pdf?index=trueIn PDF document text
    • https://ee897e78-a157-4eb5-8a47-d615096087a2.filesusr.com/ugd/113e89_6e5b374472f84b3d8a4f59b4730b4cdd.pdf?index=trueIn PDF document text
    • https://9f4ad419-87ad-4507-9b23-40b7c7395cc9.filesusr.com/ugd/55478e_00adb40698d74ac0afbded2f6b973d86.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xakajoziwibi/too_lazy_or_too_lazy.pdfIn PDF document text
    • https://aefb6378-f3ca-470a-b9d2-22936542d087.filesusr.com/ugd/fe129c_7c6ee3547e234aa7bd84bb70c8152ce5.pdf?index=trueIn PDF document text
    • https://413f70bc-0247-4a04-a3fc-eabb14e2b93f.filesusr.com/ugd/f18ee6_949361c4d2254df4aee9ec9d09aa7b9a.pdf?index=trueIn 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_off0000f769.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF769 5416 bytes
SHA-256: b918777b57b3932bdc3e7ba7db14dbc6a80bb1116a1d360726cb30e069133576
font_01_sfnt_off000109b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109B0 10804 bytes
SHA-256: f3740c1774be199be5678e637b9327214a10dfbd4f8ee50a01fa8637fdddef9e

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