Malicious PDF — malware analysis report

Static analysis result for SHA-256 77c92634b4ab20c6…

MALICIOUS

PDF

74.3 KB Created: 2021-03-24 08:15:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3ae6b7142f1770f929dbcfac8b65e6f5 SHA-1: da4371695f0e6afcb6fb8084118abe620eee2cec SHA-256: 77c92634b4ab20c60eb061d559571820b4842739b8f12833e02a9a46cc9407cf
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_LINK_FARM' suggests the document is designed to host a large number of external links, likely to distribute further malicious content. The presence of external URIs and a link farm points towards a phishing or content-distribution attack, potentially using the "Whole foods mission statement" as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ponafet.ru/wix?keyword=whole+foods+mission+statement
    • https://static.s123-cdn-static.com/uploads/4500910/normal_5fdee6bd2da1c.pdf
    • https://cdn.sqhk.co/famuxina/kdNjbyv/pikenimedirigoxoja.pdf
    • https://cdn.sqhk.co/mifijizudi/hgtCU2X/tobapemakonijosobowunedu.pdf
    • https://kuritemu.weebly.com/uploads/1/3/1/3/131383398/watokak_lijubaboxaso.pdf
    • https://cdn.sqhk.co/xuzuvazol/qN4cggt/98122610174.pdf
    • https://cdn.sqhk.co/zuxolusufa/cChaih2/emoji_puzzle_game.pdf
    • https://cdn.sqhk.co/lexaxemiji/hfLghw1/88516169989.pdf
    • https://nasewinadomev.weebly.com/uploads/1/3/4/5/134521200/rulef.pdf
    • https://cdn-cms.f-static.net/uploads/4445889/normal_603ef39eb7754.pdf
    • https://vilegewadaw.weebly.com/uploads/1/3/5/3/135324537/mikawemosobage.pdf
    • https://bovefunovowuto.weebly.com/uploads/1/3/0/8/130873908/a371181d.pdf
    • https://kobokudebixisog.weebly.com/uploads/1/3/5/3/135390699/gowesuleduvuwug_mowefumu.pdf
    • https://static.s123-cdn-static.com/uploads/4366010/normal_5fc99ab49221f.pdf
    • https://tumafivefaj.weebly.com/uploads/1/3/3/9/133999435/dosazoze-botab.pdf
    • https://miwidikanizi.weebly.com/uploads/1/3/4/0/134016908/pudarigonebusi_kejefonibalep_mefenika_jevelagapu.pdf
    • https://cdn.sqhk.co/padasagam/jygehdg/learn_thai_with_mod.pdf
    • https://cdn.sqhk.co/xivijela/lXKatOB/octane_for_cinema_4d_r20_free.pdf
    • https://bisenazogogo.weebly.com/uploads/1/3/4/6/134686343/koxubijapuwiduna.pdf
    • https://cdn-cms.f-static.net/uploads/4375517/normal_604cd2d2675e7.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://e8f98835-b194-42a5-b43f-fe2f29920dd6.filesusr.com/ugd/bf650e_1a355acba3a5441e91e967ffd5c0d3ce.pdf?index=true
    • https://01c19f78-c7d0-441a-b56a-8672493f87de.filesusr.com/ugd/9d66c7_b7d55924e33940dabaa2663f572db637.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e486.bin
d939136fb6507aaf139f9ee6686fbed0f9a6162980221cc17799513400ca69fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE486 5064 bytes
font_01_sfnt_off0000f5a7.bin
bedf8e7fa9e29b6735c501e1598deee80fc1c12d4e47e7a7b46782945fa2a573		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF5A7 10700 bytes

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