Malicious PDF — malware analysis report

Static analysis result for SHA-256 04d0bbcf4ff0dc4b…

MALICIOUS

PDF

96.2 KB Created: 2021-05-03 07:42:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: a0a2596790088d1d5131b04e109c10cc SHA-1: 28a52aa2339f9f5b0764a05dfee04558886073fd SHA-256: 04d0bbcf4ff0dc4b14c71e7eea843d1be995130f752895f026315197cab8004c
186 Risk Score

Malware Insights

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

The PDF contains a link farm with 30 external links, many pointing to disposable hosting, suggesting a phishing or malware distribution attempt. The primary URL, https://xajibur.ru/strik?utm_term=flight+simulator+x+2016+apk+download, is likely a lure for downloading unwanted software. While no scripts were extracted, the PDF structure and numerous external links strongly indicate malicious intent, as confirmed by ML and ClamAV detections.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://xajibur.ru/strik?utm_term=flight+simulator+x+2016+apk+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4465007/normal_60449436ef7de.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366397/normal_5fd201b983cb8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451350/normal_6040b56f98aaa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451971/normal_5ffd991f31e0a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450440/normal_5fd652169de9a.pdfIn PDF document text
    • https://wefigofotagovir.weebly.com/uploads/1/3/4/8/134864379/8874314.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450340/normal_5ff29ebd2d364.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378175/normal_6015c5dee0665.pdfIn PDF document text
    • https://jubuxazule.weebly.com/uploads/1/3/4/5/134585976/wavegugumokujaxidi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380523/normal_5fc6ad77ed8d6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471513/normal_605bfc5242e49.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446264/normal_6067589975789.pdfIn PDF document text
    • https://benesigonej.weebly.com/uploads/1/3/1/6/131607635/b78a2e835db5a98.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448713/normal_601d3917f1f65.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379837/normal_5fe7ed14d1ea7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374703/normal_5ffa4c9e83453.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386613/normal_60641f3540388.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jidagafinuxesu/2005_chrysler_crossfire_owner_s_manual_free.pdfIn PDF document text
    • https://s3.amazonaws.com/rikolesafuwofar/jimilagewow.pdfIn PDF document text
    • https://s3.amazonaws.com/kikunojulejuj/worksheet_4._16_reflexive_verbs_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/vipuxafol/40134729607.pdfIn PDF document text
    • https://54a0e2cb-796f-4f80-9aaf-d11633176b06.filesusr.com/ugd/b0c554_e30043eda6a54832843e90777798398d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tuxexi/35280951771.pdfIn PDF document text
    • https://0491f86b-060d-4f4a-be23-b0d01488777f.filesusr.com/ugd/faa7ef_fa3da8bb80204c03b841bbf903e34f8f.pdf?index=trueIn PDF document text
    • https://07e0a16e-b77d-475b-b724-88bbaedb347c.filesusr.com/ugd/8e9e2f_486d1cba75f542ab802d2029e0cedf8f.pdf?index=trueIn PDF document text
    • https://3745348a-78a0-42d7-8ff4-af2b45bf5faf.filesusr.com/ugd/02631b_06bbf2f3d4b6426a819a206b1e227b1c.pdf?index=trueIn PDF document text
    • https://c1e70603-6ca1-47bc-880b-b60d7d434995.filesusr.com/ugd/df625d_c6936ff89653454ab41904f613f7b574.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_off00013728.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13728 6032 bytes
SHA-256: b953b618325b678c5527a870c061f781f8273c912427997d416e5f47e76ee565
font_01_sfnt_off00014b9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B9D 11584 bytes
SHA-256: 0ad1e519399973994526f7e35494231441f2790c905a8b16bcd80c54bb5cc484

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