Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f83296ab662c3df…

MALICIOUS

PDF

32.3 KB Created: 2020-03-13 01:46:47 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 0fe0b38398a757cf2c2ded3991440eac SHA-1: 783a4e9b0ab5bf38ace3d1fbab0a56b6df2d22cb SHA-256: 1f83296ab662c3dffe13d7aba918a0850cfb77b6b326fe1cd43361521b64c299
94 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various PDF files hosted on different domains, suggesting a link farm or SEO manipulation tactic. The ML classifier also strongly indicated maliciousness. No scripts were extracted, and the document body is largely unreadable, but the presence of numerous external links is the primary indicator of malicious intent.

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://globallycraftedtravel.voyagerwebsites.com/uploads/1/3/0/8/130874359/130874359.html#managerial+accounting+garrison+solutions+free
    • http://foto-research.com/uploads/1/3/0/7/130740010/2e160f.pdf
    • http://alternativetransportationgroup.com/uploads/1/3/0/6/130621267/xabizuzetiseg_dumopate_mukaz_suzafovo.pdf
    • http://daniel-stripedtiger.com/uploads/1/3/0/6/130621695/bopatukosisakisa.pdf
    • http://vergisdigitalmarketing.com/uploads/1/3/0/6/130622116/b13df9f48455.pdf
    • http://thetucsonroofer.com/uploads/1/3/0/4/130488244/pumoditoneme_saliteripu_fevino.pdf
    • http://mail.istanbulankastre.com.tr/uploads/1/3/0/4/130488063/6412187.pdf
    • http://invescowallsystemsllc.com/uploads/1/3/0/2/130273872/fezota.pdf
    • http://tap-folio.com/uploads/1/3/0/5/130539016/6b30f47de.pdf
    • http://www.madelocalmelbourne.com/uploads/1/3/0/7/130738638/6148436.pdf
    • http://crowdbrain.com/uploads/1/3/0/5/130550885/08243566f.pdf
    • http://ctactile.com/uploads/1/3/0/6/130620412/jekisekuzoja-mimoto.pdf
    • http://cultivationx.com/uploads/1/3/0/6/130639133/jefazokamidaka.pdf
    • http://dredwinkurniawan.com/uploads/1/3/0/2/130270957/676806.pdf
    • http://nelighyoungmensclub.com/uploads/1/3/0/2/130270977/rinaxozepinar.pdf
    • http://serlogistics.co.uk/uploads/1/3/0/4/130483273/2dd989c907669.pdf
    • http://deliafood.services/uploads/1/3/0/6/130603737/vuzovomi.pdf
    • http://centerforgovernmentleadership.org/uploads/1/3/0/6/130603928/a095253d.pdf
    • http://tracyabbott.com/uploads/1/3/0/8/130814877/9c9ec.pdf
    • http://truephysicaltherapy.com/uploads/1/3/0/2/130287808/xineberawelegefiboz.pdf
    • http://aapssol.com/uploads/1/3/0/3/130313494/loser-sazukatekokago.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/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005af5.bin
c7a0fd92612254ce7b757aa42fb0cdee70818f20e3b181ad1e42e1c0106f61be		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AF5 6088 bytes

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