Malicious PDF — malware analysis report

Static analysis result for SHA-256 fca0fe622d66bc15…

MALICIOUS

PDF

80.4 KB Created: 2021-03-04 20:20:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 617021f01d531ec54335702329ecb2c3 SHA-1: 16e9b335db83ee314d2b5800f7b7c63bda85b7d7 SHA-256: fca0fe622d66bc154999d8f45daf6252cf48c3afb2fbc18bb5f2f7ebfb18bf92
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as 'Pdf.Phishing.Trojan' and an ML classifier returned a high probability of maliciousness. The document body contains a deceptive title and numerous external links, indicating a potential phishing or SEO-based malicious distribution scheme. While no scripts were directly extracted, the presence of external links and the heuristic firings suggest the document is designed to redirect users to potentially harmful content.

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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jumiwimov.ru/strik?utm_term=trigonometry+for+dummies+free+pdf
    • http://setokanekema.mygamesonline.org/how_to_use_a_diffuser_and_essential_oils.pdf
    • https://cdn-cms.f-static.net/uploads/4375210/normal_600e21412f98f.pdf
    • https://golakabuzoved.weebly.com/uploads/1/3/4/8/134870140/8773ad6.pdf
    • https://rovonowevon.weebly.com/uploads/1/3/6/0/136051941/jevag_venagamar_jipedofirubiro.pdf
    • https://cdn-cms.f-static.net/uploads/4443337/normal_5fd6854addaba.pdf
    • https://static.s123-cdn-static.com/uploads/4425915/normal_5ff6d135f07f8.pdf
    • http://vuwefedope.sportsontheweb.net/zoxag.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://2c8134a4-d865-4da1-8961-c755d7242105.filesusr.com/ugd/6dcf04_cbad93e315024b66b996eb3f046626c6.pdf?index=true
    • https://3682d434-6e27-4ac8-9ac2-d3ec24fa429c.filesusr.com/ugd/9b5f63_a7ad802d46504e71970c27433255eb55.pdf?index=true
    • https://78905da9-dd21-4190-abaa-c894c042e703.filesusr.com/ugd/851c7c_b8d733ed6b1d47638a6b9c18874be951.pdf?index=true
    • http://vigavanoxe.onlinewebshop.net/38258514019.pdf
    • http://mojogoralil.onlinewebshop.net/g_shock_rangeman_gpr_b1000_strap.pdf
    • https://1c019786-7048-4615-837a-ae53f087c4ae.filesusr.com/ugd/8b4172_f1e2365a09864f9ba970ab95d2b49b69.pdf?index=true
    • https://c7972686-9310-4d97-8ac3-15e828887225.filesusr.com/ugd/8a419d_7cdaef91e8f544fea59742160145a83d.pdf?index=true
    • https://4a5660cc-52a2-48ff-9acb-4b4f1704cb6e.filesusr.com/ugd/81868d_087935534bf24ed99f6f3229ca4bcd7b.pdf?index=true
    • https://ecf8b3bd-8201-449f-a39c-156acd88681e.filesusr.com/ugd/97634b_1501ed0f12bc470f8334d720689a26c5.pdf?index=true
    • https://ed0f7819-48b4-4c0d-9119-93de03d81b9c.filesusr.com/ugd/e481ce_d89d61d2f24b4595bc0d004868c7085e.pdf?index=true
    • https://5a8aee2d-3d68-4c09-98ed-743c9c56d6fd.filesusr.com/ugd/460efe_96d7b438b9b14f76b33235ccf9d05dca.pdf?index=true
    • https://e22e8d81-f41f-4d51-abb1-39b19d2d32bb.filesusr.com/ugd/96bf9d_93598107943a4a10adde6404c8d1af6e.pdf?index=true
    • https://c788b29d-df2d-4d46-9946-349e8cce89b7.filesusr.com/ugd/a9e086_9ca8567d1f5445cf81c9bac1324f18f3.pdf?index=true
    • http://birukuf.onlinewebshop.net/lelatusokibuvulo.pdf
    • 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_off0000fd93.bin
4af3ffb5ad008a58003b0a7e045d3f831b7a0dec813f8c8e93a81b877ba91831		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD93 5172 bytes
font_01_sfnt_off00010f2b.bin
ef816fcf40e800e7222bd7dcef457efd53dd1e45d2cfd40b259a91a552bc38d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10F2B 10804 bytes

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