Malicious PDF — malware analysis report

Static analysis result for SHA-256 abbcc384ee51e61c…

MALICIOUS

PDF

43.1 KB Created: 2020-03-12 10:23:55 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: f56e409bd36dca06d5d33793843fb10f SHA-1: 67adea0b3cb1cf5f55be7e708278b4ba0745a81b SHA-256: abbcc384ee51e61cb224d5de8637740b15b4e2c6963485e8ca1e1a907a265593
96 Risk Score

Malware Insights

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

The PDF document exhibits characteristics of a link farm, with a high number of external URLs pointing to other PDF files. The ML classifier strongly indicates maliciousness, and the PDF_SEO_LINK_FARM heuristic confirms the suspicious linking pattern. The document body contains text related to stages of group development, which may be a lure, but the primary malicious activity appears to be the distribution of numerous links.

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://befreetherapy.com/uploads/1/3/0/4/130476587/130476587.html#forming+storming+norming+and+performing+stages PDF link annotation
    • http://faddishdna.com/uploads/1/3/0/4/130489122/tifolo.pdfIn PDF document text
    • http://mx.stcloudchurchofgod.com/uploads/1/3/0/8/130873741/430609.pdfIn PDF document text
    • http://www.grundeglass.com/uploads/1/3/0/2/130274076/medifas.pdfIn PDF document text
    • http://octobooty.com/uploads/1/3/0/6/130605069/1347160.pdfIn PDF document text
    • http://woodbinefarmandbrewery.com/uploads/1/3/0/6/130621089/90009d86.pdfIn PDF document text
    • http://lindiesfurniture.com/uploads/1/3/0/8/130874652/tosugebunebiro_fasepozazewekot_vuxikagedowobo.pdfIn PDF document text
    • http://purseonalityny.org/uploads/1/3/0/6/130621545/2541350.pdfIn PDF document text
    • http://purseonalityny.org/uploads/1/3/0/7/130775429/fizozevak_dutufatutozajut_bexitotite.pdfIn PDF document text
    • http://www.andorra55.com/uploads/1/3/0/4/130483940/3498664.pdfIn PDF document text
    • http://www.kathkhemicals.com/uploads/1/3/0/2/130272353/3795129.pdfIn PDF document text
    • http://weddingjunket.com/uploads/1/3/0/6/130604210/fatajigemuwi.pdfIn PDF document text
    • http://mikalivingstonart.com/uploads/1/3/0/8/130874250/befasagumanum.pdfIn PDF document text
    • http://mail.bigballoonscreations.com/uploads/1/3/0/6/130621893/6938294.pdfIn PDF document text
    • http://antarctic-huh.com/uploads/1/3/0/4/130435582/pakukewuxufo.pdfIn PDF document text
    • http://bardfamilymarketgarden.com/uploads/1/3/0/4/130489803/sezasopipaga.pdfIn PDF document text
    • http://www.fptcl.com.fj/uploads/1/3/0/7/130739980/f225240178c.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 4

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_off000077be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77BE 7548 bytes
SHA-256: 34ddf8522b413b24ac488e733b5a9cf2b282d23c7cd1f02ac58396a27f0e992d
font_01_sfnt_off00009543.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9543 2600 bytes
SHA-256: ccdb513f9f9b997ab503fae1484a3e920b4b4fc659fa9bd94a418ce32750de73

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