Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdfe6e8d3247c9b2…

MALICIOUS

PDF

72.6 KB Created: 2021-03-30 06:37:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: c34534e2e78ebabd6fe2c6d779904052 SHA-1: b22ea78545dd9f3c5af0a5223389b7b1eeb46882 SHA-256: fdfe6e8d3247c9b2a1bb5c201ecaab9a6df0ded8fcf17672d22a1fe37ad4b4a3
66 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by 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 0.9997

Heuristics 4

  • 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://nipisod.ru/wix?keyword=raft+wars+1+game PDF link annotation
    • http://tiriruno.sportsontheweb.net/49806790781.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476767/normal_603e6ee1140b8.pdfIn PDF document text
    • http://indonesia2health.online/safujekuzajetokrjbkv.pdfIn PDF document text
    • http://mugukix.mygamesonline.org/great_guitar_songs_to_learn_electric.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466161/normal_5fe6e9a94f47c.pdfIn PDF document text
    • http://lnstagramlivesupportcenter.com/how_do_i_access_voicemail_on_my_panasonic_phoneqgna3.pdfIn PDF document text
    • http://nitapida.mywebcommunity.org/africa_political_map.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367621/normal_6002adc0628bf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370284/normal_5fefa6e5e1fd1.pdfIn PDF document text
    • http://3203epworthcres.com/honda_hs828_snowblower_partsx6mh5.pdfIn PDF document text
    • http://xelamoxadavas.mywebcommunity.org/alphabets_coloring.pdfIn PDF document text
    • http://vikiduxa.mywebcommunity.org/govomovesatidaziribirixur.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://9ebe8999-295a-4f11-87dc-c96f3e1b46ff.filesusr.com/ugd/8de238_194d10f81d2b4739993b965a5786f79e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d12737e2-2d2b-44b9-a08c-41c13ce6e82a/vipebex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6356c947-a181-4a3f-b79d-a2d09cfe2c9f/97461833876.pdfIn PDF document text
    • https://3568ea06-17fa-4787-91ae-86b9aa918cbd.filesusr.com/ugd/8ade13_1a42119d50794276a939bc1640779f8a.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_off0000df66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF66 5208 bytes
SHA-256: 17613bbbd00637a1d3573d4061827f81f988467b957c50c9c2eadb6956100096
font_01_sfnt_off0000f12b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF12B 10760 bytes
SHA-256: 013ac26c1026f8e4ff20c2db5c895bd8072327ea810e5c3ebbd9016ac934e530

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