Malicious PDF — malware analysis report

Static analysis result for SHA-256 44c5487da1fdb634…

MALICIOUS

PDF

43.9 KB Created: 2020-03-21 14:50:23 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: a07342d095d8853852639427af347f7f SHA-1: bd47c6a3eac63c35ee08e5e200d4ed5a32ba631e SHA-256: 44c5487da1fdb634c1beb005727995ac8b0b1513f56591c40beb6b433fefb8c2
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which appear to be generated for SEO purposes. The ML classifier strongly indicates maliciousness. The primary attack pattern involves directing users to external resources, likely for further exploitation or to host malicious content. No scripts were extracted, limiting the ability to determine specific payload delivery mechanisms.

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://angela-swanson.com/uploads/1/3/0/6/130604519/130604519.html#dissolved+oxygen+and+aquatic+primary+productivity+lab PDF link annotation
    • http://webmail.humanconnectionsniagara.com/uploads/1/3/0/2/130289803/wegimakotebalo.pdfIn PDF document text
    • http://openstemlabs.com/uploads/1/3/0/7/130775247/gevewadasukufupaz.pdfIn PDF document text
    • http://emmarash.ronrash.com/uploads/1/3/0/6/130621200/rirazoj.pdfIn PDF document text
    • http://misspaulayoga.net/uploads/1/3/0/7/130738892/debovifif-gejabugagipad.pdfIn PDF document text
    • http://thegreatfactor.com/uploads/1/3/0/7/130775572/0e11807e8ac90.pdfIn PDF document text
    • http://mamasamosa.com/uploads/1/3/0/2/130287238/remefutufip.pdfIn PDF document text
    • http://www.victoriatravel.biz/uploads/1/3/0/5/130539408/kalesoborawujil.pdfIn PDF document text
    • http://cinemapurgatoria.com/uploads/1/3/0/7/130740497/zesesow.pdfIn PDF document text
    • http://sandyridgebaptistchurch.org/uploads/1/3/0/4/130476574/bikowuf.pdfIn PDF document text
    • http://applesintheseed.com/uploads/1/3/0/7/130739777/todimawirofid-zijuxosajedolad-wakal.pdfIn PDF document text
    • http://saloteflorist.com/uploads/1/3/0/5/130551700/1189375.pdfIn PDF document text
    • http://mountainsportandfitness.com/uploads/1/3/0/6/130621640/83bedb1f7a20cab.pdfIn PDF document text
    • http://007securitynetworking.com/uploads/1/3/0/2/130272609/lepud.pdfIn PDF document text
    • http://kathleencurry.net/uploads/1/3/0/6/130621443/4cd16b604f.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 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_off00007a0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A0A 7772 bytes
SHA-256: 2e035060a49fd021e1b6ac190857f5f5a3d2cb5e78c020c971338ba094391870
font_01_sfnt_off0000982c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x982C 2652 bytes
SHA-256: e2f1373bf3d70a40ff4276a486f0a1d2d32154e4f45ad1243a44c3d3b7d91cea

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