Malicious PDF — malware analysis report

Static analysis result for SHA-256 a95566a639d8def0…

MALICIOUS

PDF

90.2 KB Created: 2021-03-15 16:14:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 92c192b203c31d0d7fae18861a17f0e2 SHA-1: ccdf3a459c45eb8d127fff50b880e4197ef8030b SHA-256: a95566a639d8def0e6fa59d7739223867e5b7674a9ca5b6a793e7e044723be6d
194 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were extracted, the PDF structure and numerous URLs point towards a phishing or content-luring attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/wix?keyword=michael+vey+book+6+pdf+free PDF link annotation
    • http://strita.space/sixukisakojgnlk.pdfIn PDF document text
    • https://resawipodejevi.weebly.com/uploads/1/3/0/8/130814711/sabur_xodebiserisago_degetuda_kigexuduxekazev.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475987/normal_603d895f1ffb8.pdfIn PDF document text
    • http://sarhello.online/52979095151lsf0m.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443329/normal_5fcb72a1d28f4.pdfIn PDF document text
    • http://thiswaytovogue.com/real_drift_car_racing_game_download_apksywpv.pdfIn PDF document text
    • https://lufiwusogak.weebly.com/uploads/1/3/4/3/134319395/vateloramelutatoxine.pdfIn PDF document text
    • https://leviwajij.weebly.com/uploads/1/3/1/6/131637177/2547385.pdfIn PDF document text
    • https://pidesetax.weebly.com/uploads/1/3/0/7/130739971/d7934450a463.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kofaxafogi.myartsonline.com/mudogetomuxona.pdfIn PDF document text
    • http://pipikujawi.rf.gd/bd_lsrfortessa_user_guide.pdfIn PDF document text
    • https://da550aaf-34ae-4f9b-ad82-7836b82beebe.filesusr.com/ugd/a203e6_7e10824c1ae747cc8f7ee12ee8e736ac.pdf?index=trueIn PDF document text
    • http://nijarigu.onlinewebshop.net/bunariviba.pdfIn PDF document text
    • https://94226b1b-8363-4ad6-a779-e61b7b16ff5b.filesusr.com/ugd/b3bc21_a8cb4437dbdf427481a55943294a617e.pdf?index=trueIn PDF document text
    • http://dadokupokumudav.rf.gd/desopuzolosidepuwemokes.pdfIn PDF document text
    • http://wedizakur.epizy.com/nuzewilaz.pdfIn PDF document text
    • https://44bb6ee8-a0fe-4f72-890f-0f0a2fec05cf.filesusr.com/ugd/b65acf_38b545664b5c498b896bfcf9eb2eb17c.pdf?index=trueIn PDF document text
    • http://rinonefor.rf.gd/99687098111.pdfIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010d9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D9A 5588 bytes
SHA-256: ecc83a7d934a021fc3e90807f4b343d3d25f1ed1b65f8c2dbe9c18d80a51c9e1
font_01_sfnt_off000120af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120AF 10828 bytes
SHA-256: 7441ab3ed99ad25063c37314845c2324e85519be0911eefc0a1bb3d3d3b8e23a
font_02_sfnt_off000145e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x145E0 16248 bytes
SHA-256: cacce353daa52449aaa2dc03ff14e12d7f37b8e2e541d6bae97b449db5f5a003