Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc072e6acedff90f…

MALICIOUS

PDF

85.2 KB Created: 2021-03-28 04:18:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 7747275330e5f6cbdae48ed01f8d5003 SHA-1: 4f2e36f6ddd4071ac3eff83f85e730c5ecf805af SHA-256: bc072e6acedff90f45d0d60855f8d4f2891f09d9d429a7059108e603df4cbdb8
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed to redirect users to malicious content. The primary URL, 'https://maypoin.ru/award?keyword=ccna+pdf+notes+with practical', is presented as a lure for technical documentation, likely to mask malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://maypoin.ru/award?keyword=ccna+pdf+notes+with+practical PDF link annotation
    • https://tuwakunasuj.weebly.com/uploads/1/3/0/8/130874309/12b1e2120e.pdfIn PDF document text
    • http://wogivodugakovek.mygamesonline.org/the_book_thief_summary_part_10.pdfIn PDF document text
    • http://vuwiwetidajin.mywebcommunity.org/architect_personality.pdfIn PDF document text
    • https://mututekabifu.weebly.com/uploads/1/3/4/4/134466573/675c215fb90785b.pdfIn PDF document text
    • https://bikubelefa.weebly.com/uploads/1/3/1/6/131606475/33c96d8b718c9a.pdfIn PDF document text
    • http://lazakefezives.mygamesonline.org/89839773738.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367905/normal_5ff886b46f1e1.pdfIn PDF document text
    • https://nemelodanunoju.weebly.com/uploads/1/3/0/8/130874480/25e88111f6e77.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392651/normal_6006b7600ae41.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463308/normal_605d36bb685dc.pdfIn PDF document text
    • http://paselon.getenjoyment.net/a_little_history_of_the_world_book_review.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391896/normal_5fd3083537954.pdfIn PDF document text
    • https://sudarotabodubig.weebly.com/uploads/1/3/1/4/131407445/naxaluxaxomasejije.pdfIn PDF document text
    • https://gifezimudafero.weebly.com/uploads/1/3/4/3/134312010/mimexi.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
    • https://s3.amazonaws.com/resixexi/jobs_daughters_ritual_book.pdfIn PDF document text
    • https://s3.amazonaws.com/marimejerebo/21432621477.pdfIn PDF document text
    • https://55d63786-14d6-44de-84d0-33f1fb383c44.filesusr.com/ugd/45fd81_e7efe72a1130486ea12d1e3bca481ce7.pdf?index=trueIn PDF document text
    • https://d7b50aa0-fea3-4edc-ba9e-4ed0094b0c60.filesusr.com/ugd/7f614e_4a0898a0bced45909056d5b494076881.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gonima/cosmopolitanism_ethics_in_a_world_of_strangers_download.pdfIn PDF document text
    • https://s3.amazonaws.com/xefejevife/commission_payout_report.pdfIn PDF document text
    • http://jomupaz.myartsonline.com/letaluruzobudifufuropirus.pdfIn PDF document text
    • https://44dd6259-7513-41c7-b2f1-b2b1fc385d2e.filesusr.com/ugd/63022f_0f35b8a5707d4772bb0eb6269759315e.pdf?index=trueIn PDF document text
    • https://03ca3561-abfe-48ca-9b59-b1b2b77f8126.filesusr.com/ugd/1af49e_92c047e18637458692f4e53065fa23af.pdf?index=trueIn PDF document text
    • https://8eb0ff2f-1b5f-41fb-a82b-bf279dc7f43e.filesusr.com/ugd/868f76_8d0e389e92154471b04f0e7403eb6b7a.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fdad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDAD 5148 bytes
SHA-256: 0d734adbd9b6c353b4764ba903951757fea73f788601d4f0340585459eeb36c9
font_01_sfnt_off00010f32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F32 11856 bytes
SHA-256: 524cc086e00dbfd202beedcab87209ce9b8d6afafdc71e24139e671516609dc9
font_02_sfnt_off00013721.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13721 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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