Malicious PDF — malware analysis report

Static analysis result for SHA-256 36b784a3dbae5658…

MALICIOUS

PDF

73.2 KB Created: 2021-05-21 13:42:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: f5271e493a6cb12e97b4a8136bdc6f9b SHA-1: 204d221b78d0ba77153eecb8b741d43e899b3fde SHA-256: 36b784a3dbae5658420afb0cef9d2e6106b63c9f167a47229299bb45aa067318
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are hosted on S3 buckets and Weebly, suggesting a link farm or SEO poisoning attempt. The primary URL, 'https://maypoin.ru/strik?utm_term=how+do+i+reset+a+hisense+roku+tv', is presented as a search result, indicating a phishing or malicious content lure. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://maypoin.ru/strik?utm_term=how+do+i+reset+a+hisense+roku+tv PDF link annotation
    • https://duzozerijadid.weebly.com/uploads/1/3/4/4/134493401/7434353.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450884/normal_6030190d3b2b2.pdfIn PDF document text
    • https://zofenegug.weebly.com/uploads/1/3/1/6/131636866/galojokisenawuge.pdfIn PDF document text
    • https://nurufumetexode.weebly.com/uploads/1/3/5/3/135323779/0268ecc837a448.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423429/normal_6045030a80dfc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494875/normal_604e69001a0d5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486035/normal_60039ccfd4fc4.pdfIn PDF document text
    • https://domisupufiz.weebly.com/uploads/1/3/5/3/135316273/203603.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481166/normal_606687854a940.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499653/normal_606691344b570.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474222/normal_6057e5105c8fa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406501/normal_5ffe73bb53e5a.pdfIn PDF document text
    • https://valojeruxul.weebly.com/uploads/1/3/4/6/134681631/bonilebasowuwewiga.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/timeziso/62315361521.pdfIn PDF document text
    • https://s3.amazonaws.com/pogolo/vedonirofu.pdfIn PDF document text
    • https://s3.amazonaws.com/nawuvud/duzuwurasovez.pdfIn PDF document text
    • https://s3.amazonaws.com/legesiliv/20093409065.pdfIn PDF document text
    • https://s3.amazonaws.com/siwixomudit/advantages_of_case_study_research_design.pdfIn PDF document text
    • https://s3.amazonaws.com/fikuvine/ill_see_you_in_my_dreams_baritone_ukulele_chords.pdfIn PDF document text
    • https://s3.amazonaws.com/xokebore/39230637347.pdfIn PDF document text
    • https://s3.amazonaws.com/wutisigila/noam_chomsky_manufacturing_consent_amazon.pdfIn PDF document text
    • https://s3.amazonaws.com/gurupixabogivaz/safety_net_insurance_login.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_off0000e047.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE047 5060 bytes
SHA-256: 6dea85cae2ff1d0cc572c2c921327ecd7361fd99fa34c1f876a15359a98095c6
font_01_sfnt_off0000f186.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF186 11092 bytes
SHA-256: d29f8073b5acd612c514ab7a98ac3fae48224eef5dcd6e106feafb2bc71969a9

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