Malicious PDF — malware analysis report

Static analysis result for SHA-256 82a558124465447b…

MALICIOUS

PDF

47.4 KB Created: 2020-05-22 14:16:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-07
MD5: 1a7d75aa026e992b5a59b3a4f36ba2a3 SHA-1: aa5bf36ff695c5aaa6a62842f8292599686ea25d SHA-256: 82a558124465447b40e10d7bfc2f2f95d8fc8bf23e90e6d82bb734882d867afd
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various domains, suggesting a coordinated effort to manipulate search engine results or distribute malicious content. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of harmful intent.

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://host171.carmichaelnl.com/uploads/1/3/0/6/130604420/130604420.html#mechanics+of+materials+2nd+edition PDF link annotation
    • http://doggiedeluxe.com/uploads/1/3/1/6/131607635/danoled_vawinafuj_luzeleja.pdfIn PDF document text
    • http://lillichart.com/uploads/1/3/1/6/131606597/4379912.pdfIn PDF document text
    • http://mybiginterview.com/uploads/1/3/1/4/131408086/wumipawaku_lurifex.pdfIn PDF document text
    • http://veganagogoorganics.com/uploads/1/3/1/4/131483371/wuzosabixanuxabu.pdfIn PDF document text
    • http://zachbebel.com/uploads/1/3/0/5/130551597/6959102.pdfIn PDF document text
    • http://harrisonyearbooks.com/uploads/1/3/1/3/131380305/lixilupusun-fafelexejis-zusadatibak-latul.pdfIn PDF document text
    • http://mail.bigcreekkennels.com/uploads/1/3/0/5/130588248/patoluzokodewukexu.pdfIn PDF document text
    • http://joconnorbandproject.com/uploads/1/3/0/7/130775049/8373583.pdfIn PDF document text
    • http://alluneedonline.net/uploads/1/3/0/5/130550827/45c6fc78a1e946.pdfIn PDF document text
    • http://crochetbling.com/uploads/1/3/0/4/130477468/2898548.pdfIn PDF document text
    • http://thebritishhotel.net/uploads/1/3/0/2/130271158/890cd.pdfIn PDF document text
    • http://hearyeinvitations.com/uploads/1/3/0/8/130815277/zixezifupepofagak.pdfIn PDF document text
    • http://joelleallencounselling.com/uploads/1/3/0/7/130739404/dajomanegitakas-mafakul-vexedewa-zowidipevox.pdfIn PDF document text
    • http://michaelmccormackarts.com/uploads/1/3/0/4/130488884/2943525.pdfIn PDF document text
    • http://sienahoefling.com/uploads/1/3/0/5/130588833/pupedujudofumo-mafejirufedow-gekijarot.pdfIn PDF document text
    • http://watatkd.com/uploads/1/3/0/5/130588685/farutosidi-voxugexubugavu.pdfIn PDF document text
    • http://redefinetherapy.org/uploads/1/3/0/5/130539114/6122300.pdfIn PDF document text
    • http://jdsalazarproductions.com/uploads/1/3/1/6/131637830/21201d921.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 6

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_off0000744a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x744A 10424 bytes
SHA-256: 85773914939d32ec3cea1263a34be520b990a98511063ca0ac6d6e45b2fdf7ef
font_01_sfnt_off000097b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x97B9 17436 bytes
SHA-256: 7a1c3a1409cadba5655e718208952661d75bb35cb30a5ac3e370bea4f6b7683e

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