Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e907ba1e727b863…

MALICIOUS

PDF

36.0 KB Created: 2020-03-13 04:29:24 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 5725e53737685654c044bd38fa1a93ca SHA-1: 1bddb714b8e559497faef931d7ddb5ee5219c5c5 SHA-256: 1e907ba1e727b86300611946fbaeb3b3ea5d65f0a6da07653985cf27f9f58cc3
96 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 common tactic for SEO spam or to redirect users to malicious sites. The document body, though partially corrupted, contains text related to 'Tensile strength' and mentions 'wkhtmltopdf', suggesting a lure to disguise the malicious intent. The primary heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external links, with 'prospecting.agency' being a dominant host, pointing towards a link farm or content redirection scheme.

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://sta-66-99-58-199.ladse.org/uploads/1/3/0/4/130435509/130435509.html#tensile+strength+vs+ultimate+tensile+strength PDF link annotation
    • http://prospecting.agency/uploads/1/3/0/2/130289809/1486078.pdfIn PDF document text
    • http://foundersglobal.com/uploads/1/3/0/8/130813762/pedubola-tuxupirumozi-soruwutenonixi-volexitemaf.pdfIn PDF document text
    • http://mta-sts.mx.mandanparade.com/uploads/1/3/0/4/130476040/pobamifuvomiwo-kakaka-kiramu.pdfIn PDF document text
    • http://www.ritaswa.com/uploads/1/3/0/5/130541745/b3bf91e9a7bf3.pdfIn PDF document text
    • http://www.lakefineart.com/uploads/1/3/0/7/130775156/nobeb_kenavolulatizon_sisuxopagu.pdfIn PDF document text
    • http://drareez.com/uploads/1/3/0/9/130969089/lipetupitadumuwok.pdfIn PDF document text
    • http://mgomeslaw.com/uploads/1/3/0/7/130739786/3020560.pdfIn PDF document text
    • http://drbrentschillinger.com/uploads/1/3/0/5/130589246/dilamunatapaj.pdfIn PDF document text
    • http://heidiwoelfle.com/uploads/1/3/0/9/130969837/lowom.pdfIn PDF document text
    • http://mscbmx.com/uploads/1/3/0/7/130740211/jukose.pdfIn PDF document text
    • http://perfectpairvideo.com/uploads/1/3/0/6/130621819/lufukoj_nuzijogewor_rinolunij.pdfIn PDF document text
    • http://rivervalleycareersolutions.com/uploads/1/3/0/2/130287521/4537143.pdfIn PDF document text
    • http://ridgidfitness.com/uploads/1/3/0/2/130288310/1814413.pdfIn PDF document text
    • http://hassetthomeimprovement.com/uploads/1/3/0/4/130483147/a0d3304.pdfIn PDF document text
    • http://mh-aero.de/uploads/1/3/0/6/130604434/7672381.pdfIn PDF document text
    • http://msmaley.com/uploads/1/3/0/6/130620764/4838998.pdfIn 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
🗂 Part of campaign: breadin5minutes.com 5 samples

Related samples 3

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_off0000661c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x661C 6756 bytes
SHA-256: 33bdc2213b40a3848599b3718fd8d0d3ba0a8448de999de48e0580d917ea4275

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