Malicious PDF — malware analysis report

Static analysis result for SHA-256 e642ed7f589ab692…

MALICIOUS

PDF

41.9 KB Created: 2020-03-27 04:14:20 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 4fdb044afc0189b52985a6d5f20767d7 SHA-1: 32e676b9f3c9b2b40410b8eb6fe3ba8997010ae2 SHA-256: e642ed7f589ab6928cbf2581a19c658f1ba902d95038ab5ba2322125f04af5ac
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of external links, many of which point to other PDF files, suggesting a link farm or SEO poisoning tactic. The document body, though heavily obfuscated, contains references to 'Adobe premiere pro cs6 tutorial pdf download', indicating a lure to disguise the malicious intent. The primary attack pattern involves directing users to a multitude of potentially malicious or misleading external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • 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 http://calloniris.com/uploads/1/3/0/4/130476039/130476039.html#adobe+premiere+pro+cs6+tutorial+pdf+download PDF link annotation
    • http://bellosoftware.com/uploads/1/3/0/5/130551248/kofobopubo_nifevozi.pdfIn PDF document text
    • http://paigeleandraphotography.com/uploads/1/3/0/7/130775751/doguvemud.pdfIn PDF document text
    • http://ajc308.com/uploads/1/3/0/6/130639045/9305360.pdfIn PDF document text
    • http://www.dragonsbreathmagictapping.co.uk/uploads/1/3/0/5/130542692/6593923.pdfIn PDF document text
    • http://www.loyeeleads.com/uploads/1/3/0/4/130483302/fupijunepipodujo.pdfIn PDF document text
    • http://alexandrethiery.com/uploads/1/3/0/4/130490151/somen_tunox_sakimu_nepiseraj.pdfIn PDF document text
    • http://www.nomadscomedyclub.com/uploads/1/3/0/8/130874266/vezedixekupone_xakurajavigu_gimumewowukufa_jijugipefix.pdfIn PDF document text
    • http://www.moderndaymira.com/uploads/1/3/0/8/130814411/jupotak_roropexaxolo.pdfIn PDF document text
    • http://numb-skullz.com/uploads/1/3/0/8/130814448/nazipuwit.pdfIn PDF document text
    • http://godeco.fr/uploads/1/3/0/3/130379634/197db99e04b.pdfIn PDF document text
    • http://ark47.com/uploads/1/3/0/2/130292104/7907839.pdfIn PDF document text
    • http://redfernbusinesslearning.com/uploads/1/3/0/8/130874358/tonej_dosedulalowed_worufugu_taropijixizodow.pdfIn PDF document text
    • http://chefdirectservices.com/uploads/1/3/1/1/131163732/36d8c0e0a4e10.pdfIn PDF document text
    • http://www.1ldesign.com/uploads/1/3/0/7/130776619/9245316.pdfIn PDF document text
    • http://roseblhair.com/uploads/1/3/0/6/130605044/wevokubajixeveweb.pdfIn PDF document text
    • http://zxueproe.brdge.org/uploads/1/3/0/7/130740001/fijokexuk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006dde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DDE 10392 bytes
SHA-256: a32238a870bfb3babbd5acdcc3ccd879a9c90124c4a5caf53ad442d7c99223c2
font_01_sfnt_off00009055.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9055 2652 bytes
SHA-256: e2f1373bf3d70a40ff4276a486f0a1d2d32154e4f45ad1243a44c3d3b7d91cea

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