Malicious PDF — malware analysis report

Static analysis result for SHA-256 82be22ea54b1bb48…

MALICIOUS

PDF

39.9 KB Created: 2020-05-22 15:08:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 8853cfd26fcf9482af01be8c4345aae1 SHA-1: 0e400c973c49808e244ef49aa2a975341a88fe36 SHA-256: 82be22ea54b1bb488ccb87127af2aa3c0bf444d867c5b1c4d8d3334ca802d6d9
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. The ML classifier also flagged this PDF as malicious. The primary purpose appears to be directing users to a vast network of websites, likely for SEO manipulation or to serve further malicious content. 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://genservicecontracting.gammaxiques.org/uploads/1/3/0/7/130775911/130775911.html#archaeologist+bard+guide+pathfinder PDF link annotation
    • http://declutterwithdawn.com/uploads/1/3/0/6/130639059/3770375.pdfIn PDF document text
    • http://cleanproservices.net/uploads/1/3/1/3/131379213/kakidejufux-biriloxid.pdfIn PDF document text
    • http://photoeditingbyemmie.com/uploads/1/3/0/5/130540714/42de06bf35f3f.pdfIn PDF document text
    • http://printimaginations.com/uploads/1/3/0/6/130620921/dea4b0dad063.pdfIn PDF document text
    • http://legalvideopartners.com/uploads/1/3/1/4/131455141/vomogoxaderatag-kigusijazimaxub-gupuzimenab.pdfIn PDF document text
    • http://romodesigns.com/uploads/1/3/0/6/130639052/bovositozu-jusejawog-nadad-turiwedixizo.pdfIn PDF document text
    • http://mentorconcrete.com/uploads/1/3/1/4/131438356/kewagesab-pupizuluti-pepituwevixexek-sibulivepo.pdfIn PDF document text
    • http://wholesalegiftsbaskets.com/uploads/1/3/0/8/130874180/d129518e91d811.pdfIn PDF document text
    • http://therapeuticessentails.com/uploads/1/3/0/9/130969835/4857807.pdfIn PDF document text
    • http://grupodacco.com/uploads/1/3/1/3/131383679/5034878.pdfIn PDF document text
    • http://sukanyadayal.com/uploads/1/3/0/8/130874284/gokuzepuza.pdfIn PDF document text
    • http://ormhceu.com/uploads/1/3/1/1/131163514/xenexegomojupuwus.pdfIn PDF document text
    • http://solref.com/uploads/1/3/0/5/130542872/80aa0b59.pdfIn PDF document text
    • http://sunpink.com/uploads/1/3/1/4/131408928/a570e9f57.pdfIn PDF document text
    • http://empresselle.com/uploads/1/3/0/3/130313215/fbd034e225.pdfIn PDF document text
    • http://kalinkikreations.com/uploads/1/3/1/6/131636774/d4fffc.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 1

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_off000071ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71FF 10036 bytes
SHA-256: 5fa41a6b6addfc374f65f0e91d5d9ac4b605ae31d254f1252df4d865ed7c3405

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