Malicious PDF — malware analysis report

Static analysis result for SHA-256 91bcc27498964701…

MALICIOUS

PDF

36.2 KB Created: 2020-06-14 16:49:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: e65598fbaf1bd5686c542b10bef2c71b SHA-1: 62dbe03e8aff0301a64865a557b0331a423942cc SHA-256: 91bcc274989647016c7c47fbbba438b7c557ef79fca46d019f6f8a80a4cbf170
96 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various domains, many of which appear to be part of a link farm designed to manipulate search engine results or distribute malicious content. The ML classifier also strongly indicated maliciousness. No scripts were extracted from this sample.

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://theworldplaylist.com/uploads/1/3/1/0/131070581/131070581.html#perimeter+and+area+of+complex+figures+4th+grade+worksheets PDF link annotation
    • http://earnmoneyonlinematchedbetting.com/uploads/1/3/1/4/131454151/6bdcf66.pdfIn PDF document text
    • http://scoopsmunchiesnmore.com/uploads/1/3/0/7/130738909/xotixitovudodejasevu.pdfIn PDF document text
    • http://enchantebyluminous.com/uploads/1/3/1/3/131384021/11aeb02e0339.pdfIn PDF document text
    • http://lorenzocaceres.com/uploads/1/3/0/4/130477372/6592353.pdfIn PDF document text
    • http://crossfitattain.ca/uploads/1/3/0/9/130969885/ae1c521557fa3f.pdfIn PDF document text
    • http://stardustandstones.com/uploads/1/3/0/5/130589132/rabipove-basub.pdfIn PDF document text
    • http://she-racreations.com/uploads/1/3/0/8/130873855/xerenetofeduk_guzatime_fuwow.pdfIn PDF document text
    • http://nationalcrossday.com/uploads/1/3/0/8/130874067/4987362.pdfIn PDF document text
    • http://rockymountainpsych.org/uploads/1/3/0/5/130588556/mexoveseraj.pdfIn PDF document text
    • http://cleekhcomm2034su19.com/uploads/1/3/0/8/130874326/vepesiwuz_bojijuze_mirukif.pdfIn PDF document text
    • http://rafurnitureonline.com/uploads/1/3/0/5/130542728/5451264.pdfIn PDF document text
    • http://tiffanyetfleurs.com/uploads/1/3/1/3/131381003/f81332f1.pdfIn PDF document text
    • http://livinginfaithandfitnesseveryday.com/uploads/1/2/9/4/129430316/129430316.html?aventurasIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://lebetamawif.files.wordpress.com/2020/06/zufuwenunuli.pdfIn PDF document text
    • https://perukawapowe.files.wordpress.com/2020/06/63356696410.pdfIn PDF document text
    • https://polobepokug.files.wordpress.com/2020/06/30583430151.pdfIn PDF document text
    • https://jagakegu.files.wordpress.com/2020/06/ditifinowukipudo.pdfIn PDF document text
    • https://madatovo.files.wordpress.com/2020/06/vilokumumusuvaxumutuv.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
    • 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 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_off00004e79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4E79 9480 bytes
SHA-256: d1daae9733796c35d2e5f87732a8c7231230af8782caa52c639288b37ac0a415
font_01_sfnt_off00006f14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F14 16204 bytes
SHA-256: c988415812f594187b0a0ed75dc52802e798e1695b49bd300f8412a65040a449

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