Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ba9752ee027c023…

MALICIOUS

PDF

33.1 KB Created: 2020-04-02 11:40:35 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 27d4b050af4ac523c9d713f499aa9d4a SHA-1: e27404041f6079d1fa0226d3370d5ced37bcd0fc SHA-256: 8ba9752ee027c023f477ba25f4c47257da484425bdd737cf77e06180571116c4
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of external links, many of which are structured in a way that suggests a link farm for SEO manipulation or to host malicious content. The document body, though heavily obfuscated, contains URLs that are likely intended to redirect users to malicious sites. The ML classifier strongly indicated maliciousness, supporting the assessment of a phishing or malware distribution attempt.

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://smbrandmgt.com/uploads/1/3/1/3/131381901/131381901.html#cell+biology+lecture+notes+pdf
    • http://hostmaster.buymyoldvehicle-peterborough.co.uk/uploads/1/3/0/4/130493968/mawoxarakexas.pdf
    • http://tahliajfitness.com/uploads/1/3/1/4/131438155/fuvimikav.pdf
    • http://hex-apothecary.com/uploads/1/3/0/9/130969237/5366487.pdf
    • http://wpmtechgroup.com/uploads/1/3/0/7/130775471/1312021.pdf
    • http://leaderkast.com/uploads/1/3/0/7/130775398/vabonowotik.pdf
    • http://mcmurrians.ca/uploads/1/3/0/5/130552084/4667386.pdf
    • http://villa-irina-javea.com/uploads/1/3/1/3/131384082/5228462.pdf
    • http://time4others.com/uploads/1/3/0/4/130436122/miwikikez.pdf
    • http://northeasternohiomasonry.com/uploads/1/3/0/6/130604144/mepasemanu-fidowegatuwamo-dunopowifelax.pdf
    • http://cookwithcosi.com/uploads/1/3/0/5/130550711/335bf02c.pdf
    • http://villageorgiamartinique.com/uploads/1/3/0/8/130813448/3098030.pdf
    • http://mjvsms.ca/uploads/1/3/0/8/130873783/nererakulaxu.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005839.bin
913ea92e80bf52120f85496119d4fdb3d9e647fc4779e2f325c603634ae07adb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5839 8128 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.