Malicious PDF — malware analysis report

Static analysis result for SHA-256 c605186cb610dc08…

MALICIOUS

PDF

44.3 KB Created: 2020-06-25 08:45:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-08-25
MD5: 5ed236977a2ca2958a2c5e277426fd73 SHA-1: 137a226dcb36893df5145cdad1ae0c8f4c6271ec SHA-256: c605186cb610dc080642c551ecac6fa4cc0bb27387f1613181b271267487cc98
136 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, a technique often used for SEO spam or to redirect users to malicious sites. The document body, though partially corrupted, contains references to 'Openoffice org base guide' and URLs that appear to be part of a link farm. No scripts were extracted from this sample, limiting the analysis of direct malicious actions.

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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://takeflightsweettreats.net/uploads/1/3/1/3/131383751/131383751.html#openoffice+org+base+guide PDF link annotation
    • http://mase.ph/uploads/1/3/0/5/130588640/5976a4c830663ac.pdfIn PDF document text
    • http://osteopathie-ullmann.de/uploads/1/3/0/5/130541950/9660262.pdfIn PDF document text
    • http://goodsamrehabilitation.org/uploads/1/3/1/0/131070305/6305692.pdfIn PDF document text
    • http://lynnphysical.com/uploads/1/3/0/9/130969116/segob.pdfIn PDF document text
    • http://chiboutique.net/uploads/1/3/0/7/130776307/5738294e.pdfIn PDF document text
    • http://missionmobilizationjonasmuyima.org/uploads/1/3/1/4/131407135/nebinij.pdfIn PDF document text
    • http://mail.fatherjim.com/uploads/1/3/0/8/130874629/50f821448a331c.pdfIn PDF document text
    • http://dialtransportllc.com/uploads/1/3/0/2/130289453/376c90c9b3c049.pdfIn PDF document text
    • http://blisspropertydesign.com/uploads/1/3/0/7/130739974/medepixub.pdfIn PDF document text
    • http://ohio-dogbite.com/uploads/1/3/1/4/131455734/virexad-fusexo-ximusinu-kilodujur.pdfIn PDF document text
    • http://dependsontheday.co.uk/uploads/1/3/0/4/130477864/xivazademabo.pdfIn PDF document text
    • http://lra.org/uploads/1/2/9/4/129455080/129455080.html?vintageIn 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
    • http://scripts.sil.org/OFLIn 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_off00005a2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A2E 5260 bytes
SHA-256: e2489710e440eaf92663e8eb5d1599e0b112fd29d733d42bdb3869a2500ee45f
font_01_sfnt_off00006c04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C04 18640 bytes
SHA-256: ace0a0f338241cb9b27ee4cc93a4489103a59f1b76f6c08a350eded59fa0f54e

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