Malicious PDF — malware analysis report

Static analysis result for SHA-256 148d0ed1af3cdabd…

MALICIOUS

PDF

42.5 KB Created: 2020-05-21 00:47:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 67d9be3faa2f6dabb58ff9dfed38940e SHA-1: 30992f344c554a6c688755b050172d3e40fcbab5 SHA-256: 148d0ed1af3cdabd9384696736f14dabd9d5d287b4326b9c3b87d2f8ae092e22
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various domains, suggesting a link farm or SEO manipulation tactic. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the sheer volume of external links indicates a high likelihood of malicious intent, possibly to distribute malware or engage in phishing.

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://foregolfclub.org/uploads/1/3/1/4/131405951/131405951.html#shadowrun+war+stories
    • http://dessmuir.com/uploads/1/3/1/3/131379118/voseribimuf.pdf
    • http://mirabellaeventsandtravel.com/uploads/1/3/1/0/131070538/wunabogafi.pdf
    • http://idlewildmusicroom.com/uploads/1/3/0/5/130588650/zokukegima.pdf
    • http://climatcool.net/uploads/1/3/1/3/131382366/af5619958bece5.pdf
    • http://vacationseriously.com/uploads/1/3/0/8/130814186/69821874.pdf
    • http://foodintraining.net/uploads/1/3/0/6/130604984/e7d104a38.pdf
    • http://drewcourtneyspt.com/uploads/1/3/0/8/130874079/zosawiwokezutegogam.pdf
    • http://shopdiveinmagazine.com/uploads/1/3/0/6/130604708/tevasatobati.pdf
    • http://squeekycleencolumbus.net/uploads/1/3/0/8/130814288/6063623.pdf
    • http://hidayahglass.com/uploads/1/3/1/6/131606644/5866571.pdf
    • http://miracleofthedove.com/uploads/1/3/1/4/131407152/3766a0f.pdf
    • http://salt-boatworks.com/uploads/1/3/0/3/130323908/3930684.pdf
    • http://houseofgrns.com/uploads/1/3/0/6/130621675/vuporobojos-mirobil-liwazaj-kuzefixowuj.pdf
    • http://herdinglemurs.com/uploads/1/3/0/5/130540585/laneti-xusabezakanaf-novifakotar-podapixati.pdf
    • http://car1.info/uploads/1/3/1/6/131606719/wogaxalod.pdf
    • http://aerial-vue.com/uploads/1/3/1/4/131408581/numuvinag.pdf
    • http://klatenterprisesltd.ca/uploads/1/3/1/8/131856009/wabivow.pdf
    • http://racelocalva.com/uploads/1/3/0/7/130738803/64ab33e9294.pdf
    • http://vincemagana.com/uploads/1/3/0/7/130775370/7028906.pdf
    • http://richardsonscleaningservice.org/uploads/1/3/0/7/130775115/kajukejuvojaze.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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/
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007a86.bin
419f93fd733d5ccccb427d9f1244fe9a13932413b8587c0bdb170d35b538af59		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A86 10548 bytes

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