Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ada1abcfca02142…

MALICIOUS

PDF

41.4 KB Created: 2020-03-27 09:22:59 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 8cf40753b2e1bb6821ba6a9800826526 SHA-1: 206beca6d9d0c8958c1ca5796b79ffab7db1832e SHA-256: 3ada1abcfca02142b95cda6daf5857e2316d09f1ccbc0df98dba3270d83a96ed
96 Risk Score

Malware Insights

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

The PDF file contains a large number of external links to other PDF files hosted across numerous domains. This behavior is indicative of a link farm or SEO manipulation tactic, potentially used to distribute malicious content or improve search engine rankings for harmful sites. No scripts were extracted, and the document body is largely unreadable, making it difficult to determine the exact payload or intent beyond the link distribution.

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://esnorte.com/uploads/1/3/0/5/130589220/130589220.html#clasificacion+de+herramientas+manuales+pdf PDF link annotation
    • http://sirenalpha.com/uploads/1/3/0/6/130639790/5b11ad5743.pdfIn PDF document text
    • http://heathcoteandherran.com/uploads/1/3/0/7/130740143/konaw_rusapep.pdfIn PDF document text
    • http://v-on-shenton.net/uploads/1/3/0/5/130539101/6fe172ef8b3b.pdfIn PDF document text
    • http://valedetoxclinic.com/uploads/1/3/0/5/130590036/d525c339de.pdfIn PDF document text
    • http://www.truecrimeshirtclub.com/uploads/1/3/0/2/130273573/zijotesajobuje.pdfIn PDF document text
    • http://www.silverdragoncrystals.net/uploads/1/3/0/5/130588187/givomo_lefesixozugo_zexanenojag.pdfIn PDF document text
    • http://www.magicalgirlstarot.com/uploads/1/3/0/9/130969562/9988119.pdfIn PDF document text
    • http://naugatuckchamber.biz/uploads/1/3/0/3/130313333/66a7b72476.pdfIn PDF document text
    • http://flectomechanical.com/uploads/1/3/0/8/130874652/mugipajifafen.pdfIn PDF document text
    • http://life987.com/uploads/1/3/0/5/130589442/ligiz-kojelimorosoj-kudamidasigome-vutiserimepa.pdfIn PDF document text
    • http://sebzillla.com/uploads/1/3/0/6/130639984/ceb89c877093367.pdfIn PDF document text
    • http://flatbrokeapparel.com/uploads/1/3/0/7/130740053/2001800.pdfIn PDF document text
    • http://www.tauntonhillapiary.com/uploads/1/3/0/5/130550824/cdc41cd2b8f7c4.pdfIn PDF document text
    • http://aftersales.nopeus.eu/uploads/1/3/0/2/130288554/bulixizexisuzakezoxa.pdfIn PDF document text
    • http://jamesdavidson.photography/uploads/1/3/0/5/130538988/xuweje_waxenonej_jonebegujukakal_tunesove.pdfIn PDF document text
    • http://vehiclebuybackevent.com/uploads/1/3/0/6/130621802/24fce5e22.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

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_off00007109.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7109 8336 bytes
SHA-256: 3aff5d36cc48985b235bbeb7369a4c2218b33d4c1f7299bbf851feaa63d13458
font_01_sfnt_off00008f83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F83 1708 bytes
SHA-256: 83459e82cebe561b9e65dda6a09953c9e35f75e5df0fa62a624e1833cc5b8086

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