Malicious PDF — malware analysis report

Static analysis result for SHA-256 896a7e74f396305f…

MALICIOUS

PDF

45.7 KB Created: 2020-04-15 06:52:05 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 09596e2fbe63cbe5f82ae59b1015384e SHA-1: 02a877a774b2ed2a062110a141a24934d4e61223 SHA-256: 896a7e74f396305facdf263dbfdb849e3be9739c9db4e709623edc7cfd975408
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF document contains a significant number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The document body text, though partially corrupted, includes a URL that is also present in the list of extracted URLs. This suggests the primary function of this PDF is to act as a lure, directing users to a network of potentially malicious or SEO-abused websites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://mysaphi.com/uploads/1/3/0/5/130551677/130551677.html#automatic+or+manual+car+for+towing
    • http://urgent1.com/uploads/1/3/1/3/131379115/rejalo_kurowidadu_degalume_vigeresifixosej.pdf
    • http://ssdsdsd.com/uploads/1/3/0/7/130739928/lajefipedufebotij.pdf
    • http://kelianpersonalized.com/uploads/1/3/0/6/130640024/wotabi.pdf
    • http://paulbutlerusa.com/uploads/1/3/0/5/130540128/37568.pdf
    • http://torreypinesfinancial.net/uploads/1/3/0/2/130289738/gonukowaku.pdf
    • http://thewritingrocks.com/uploads/1/3/0/8/130874347/3642e012e1ea7.pdf
    • http://pixiechicks.net/uploads/1/3/0/8/130874361/gokuvened_xifolajan_dofitoja.pdf
    • http://dgmetc.com/uploads/1/3/0/7/130776228/6062210.pdf
    • http://rebeccarankinyoga.com/uploads/1/3/0/7/130776253/4585673.pdf
    • http://joselolourenco.com/uploads/1/3/1/3/131380126/1622378.pdf
    • http://invictatransportsolutions.com/uploads/1/3/0/8/130814235/voladuvijadawit_godavabowud_xinadolovolox_bepoxowojuwoped.pdf
    • http://conorfirth.com/uploads/1/3/1/0/131070571/e1dd86.pdf
    • http://invictatransportsolutions.com/up
    • 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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000767d.bin
cc8fac6c2592c71cfce7d8816b6741e53d7952a43680ed5b91670713ef0dbfbc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x767D 7920 bytes
font_01_sfnt_off00009575.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9575 16036 bytes

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