Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb298a644d9bcfdc…

MALICIOUS

PDF

77.9 KB Created: 2021-03-30 04:21:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e09cae1772340a090cb5d313177b1c6e SHA-1: ef477475903267016ce93aa01a2d9a50ff03b95b SHA-256: cb298a644d9bcfdc59b6e0cf5d1120aac9c41213d9a0968b6f5ea9a2a8fd177d
164 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are hosted on suspicious domains, suggesting a link farm or phishing attempt. The ClamAV detection and ML classifier strongly indicate malicious intent, likely to deliver a phishing payload or exploit. The heuristic PDF_SEO_LINK_FARM indicates a deliberate attempt to create a large number of links, likely for SEO manipulation or to host malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://midufefew.ru/wix?keyword=simple+investment+agreement+doc+free
    • http://prizyivnik.ru/60542533204sz093.pdf
    • https://kujegafibez.weebly.com/uploads/1/3/4/2/134265926/814e0c.pdf
    • https://bakasilamor.weebly.com/uploads/1/3/1/4/131407315/90881.pdf
    • http://tiktokfrance.fun/zombie_costume_2-_30qy4t.pdf
    • http://mybatut.store/falimiwikovaba7stei.pdf
    • https://rebejudan.weebly.com/uploads/1/3/5/3/135316845/2969660.pdf
    • http://silkhfig.bid/togodusoxiwususizopiribuwzar9c.pdf
    • https://sadupomojafex.weebly.com/uploads/1/3/0/7/130776775/tupoxifabutawiw.pdf
    • http://nebatomefov.scienceontheweb.net/metaphysics_aristotle_download.pdf
    • http://bajigesupin.iblogger.org/baixar_app_para_android.pdf
    • https://nokajavu.weebly.com/uploads/1/3/0/9/130969653/4052213.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://8eeb1f0a-0cdd-4c66-98a4-83777b49fb54.filesusr.com/ugd/64f9d2_b43924ca4501468ebec686ef518e9ba9.pdf?index=true
    • http://tugefewose.rf.gd/5474764084.pdf
    • https://s3.amazonaws.com/jedaxopopuko/travelling_allowance_for_central_government_employees.pdf
    • http://midelex.epizy.com/63022714234.pdf
    • http://fuvarijes.atwebpages.com/jewalub.pdf
    • https://ee897e78-a157-4eb5-8a47-d615096087a2.filesusr.com/ugd/113e89_9c5551f980b8452c91cd018bf5a38550.pdf?index=true
    • https://s3.amazonaws.com/pisik/87951568155.pdf
    • https://s3.amazonaws.com/wifukedot/zanudinugapijiku.pdf
    • https://s3.amazonaws.com/xukanomarexumu/pezola.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_off0000f0b1.bin
33e45ef38dc5bc7db0ac7e51d545dfa45d0b4b6863e4fe62c72a17c8a23353b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF0B1 5636 bytes
font_01_sfnt_off000103ce.bin
8f18261377a9e6efd0c0bf9a1b6fd683b855a439b25ea31f4c8a5c7dfec3699d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x103CE 11380 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.