Malicious PDF — malware analysis report

Static analysis result for SHA-256 82e532277671c11f…

MALICIOUS

PDF

82.2 KB Created: 2021-04-12 14:46:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b62eb90ea5e697724bb6f5335084af72 SHA-1: b938a921b8dfbefbc6ec4a273c80ce646f1c0cf1 SHA-256: 82e532277671c11f224612ca4f998ff6770b66b441a332d3344fcc03de18d8ce
164 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, flagged as a link farm, and one specific URL is highlighted as a potential lure. The heuristic 'SE_INVOICE_LURE' suggests the document's content is designed to trick users into clicking on these links. While no scripts were explicitly extracted, the PDF structure and the presence of numerous external links indicate a malicious intent to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://botokaw.ru/strik?utm_term=best+micro+cut+shredder+for+home+use+2020
    • https://cdn.sqhk.co/kagurase/W0Jr2Ut/my_pillow_guy_net_worth.pdf
    • https://tulivugid.weebly.com/uploads/1/3/4/6/134607321/851917.pdf
    • https://cdn-cms.f-static.net/uploads/4414869/normal_5fd6c2c1a2f2d.pdf
    • http://numulul.mygamesonline.org/present_tenses_exercises_with_answers.pdf
    • https://cdn-cms.f-static.net/uploads/4405195/normal_6038c69064c39.pdf
    • https://cdn-cms.f-static.net/uploads/4392862/normal_601b7b759457f.pdf
    • https://cdn.sqhk.co/kowazodonaf/pKc4ibd/tri-_fold_funeral_brochure_template_free.pdf
    • https://cdn-cms.f-static.net/uploads/4495526/normal_60125aed7b59b.pdf
    • http://momarivido.mypressonline.com/26063709050.pdf
    • https://cdn.sqhk.co/kufalavoxig/f0ii1ic/3d_drag_racer_v4_download.pdf
    • http://vuxilenusip.mypressonline.com/applied_behavioral_science.pdf
    • https://cdn-cms.f-static.net/uploads/4464082/normal_6022e657599f4.pdf
    • https://static.s123-cdn-static.com/uploads/4376856/normal_5fcbe5e4f33bb.pdf
    • https://cdn.sqhk.co/belumozobu/iMhegjs/kepobigixagomuwonu.pdf
    • https://static.s123-cdn-static.com/uploads/4488582/normal_5ff34aba3f6aa.pdf
    • https://dotanivim.weebly.com/uploads/1/3/4/7/134705276/5456272.pdf
    • https://lotaximadezepa.weebly.com/uploads/1/3/1/3/131379514/webopel.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://a0f88182-e1f9-4a9c-ba22-d5ce004c6985.filesusr.com/ugd/2f3216_2370c2b03b6d4eaf848a43cc0bc2092d.pdf?index=true
    • http://feferabi.atwebpages.com/anti_bullying_act_tagalog.pdf
    • https://9480ebe7-8096-4165-94d5-b35dd525e9f4.filesusr.com/ugd/07b43d_6db3128f3a3744419da4dd1fd1642ee5.pdf?index=true
    • https://6648aa49-deb3-4d6f-81a8-a63cc7a297fb.filesusr.com/ugd/38eac1_802e89dfce104089bac386253afe87cc.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1f8.bin
190d1d7fb097f282babacf5ebaa130e781dad741b011b1d131ac81132efdea59		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF1F8 5116 bytes
font_01_sfnt_off00010366.bin
5b6807a361037b657121e9c0770d5fb4256b06b7de4d87d4374218ce33e15b59		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10366 11612 bytes
font_02_sfnt_off00012b38.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12B38 4324 bytes

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