Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb7d79422180e6ab…

MALICIOUS

PDF

29.7 KB Created: 2020-05-16 06:55:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-07
MD5: feb51562d05935f0f85337d4ede9d132 SHA-1: cb696cd7f52313baee1920e4dfaf1fc5f91fe9dd SHA-256: fb7d79422180e6abbf5a09ba837145979560a124e28c7fd1c93225dd6b7b7ae3
96 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded external links, a technique often used for SEO manipulation or to distribute malicious payloads. The heuristic 'PDF_SEO_LINK_FARM' specifically flags this behavior, indicating a potential attempt to drive traffic to a network of compromised or malicious sites. The document body, though partially corrupted, contains URLs that are consistent with this pattern. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://robertshrigleywoolf.com/uploads/1/3/1/3/131382486/131382486.html#2+column+research+paper+template+word PDF link annotation
    • http://guelldisabilitysolutions.com/uploads/1/3/0/6/130604508/daredav-banukadetan.pdfIn PDF document text
    • http://envisioningjusticesolutions.net/uploads/1/3/0/7/130776252/rumarej.pdfIn PDF document text
    • http://tailgate4dogs.net/uploads/1/3/1/4/131453630/gexivize.pdfIn PDF document text
    • http://kappacleaning.com/uploads/1/3/0/4/130435922/wunikibavibor-xuragaliles.pdfIn PDF document text
    • http://thoroughbredequineservices.com/uploads/1/3/0/4/130483469/6493416.pdfIn PDF document text
    • http://trianglebusinessnetwork.net/uploads/1/3/0/8/130873818/mopapofokuviwalaxo.pdfIn PDF document text
    • http://andymackunicornart.com/uploads/1/3/0/2/130291712/fofojixijitaka.pdfIn PDF document text
    • http://zpguitar.com/uploads/1/3/0/5/130588511/2929061.pdfIn PDF document text
    • http://gobblersknobky.org/uploads/1/3/0/3/130379292/melojaf.pdfIn PDF document text
    • http://wholisticpsychotherapy.com/uploads/1/3/0/4/130483480/vibonutive.pdfIn PDF document text
    • http://ajarchinger.org/uploads/1/3/1/6/131637889/6690535.pdfIn PDF document text
    • http://aestheticsofleadership.com/uploads/1/3/0/4/130488098/tadufonopu.pdfIn PDF document text
    • http://jillsimms.com/uploads/1/3/1/4/131409841/8150135.pdfIn PDF document text
    • http://organicshowercurtaincompany.com/uploads/1/3/1/8/131872037/b60eb535.pdfIn PDF document text
    • http://dohabodymassage.com/uploads/1/3/0/7/130738526/wimavoraja.pdfIn PDF document text
    • http://mellaflooring.net/uploads/1/3/1/4/131405958/4b027ab46.pdfIn PDF document text
    • http://marquearchitects.com/uploads/1/3/0/6/130621916/vitexivab_jariwuvol_genukefazerogef.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
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 4

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

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004dc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4DC6 8720 bytes
SHA-256: efd1ae1102f62d5c274c7b09ea11eb14e476b99c50b9d795410374677dcbc0f7

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