Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f0fab01ed486da7…

MALICIOUS

PDF

32.5 KB Created: 2020-06-14 10:57:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dc89078cd04ddb54e27460559f15acf9 SHA-1: bb4eec82d641cbfe6c3f59499aef9b72f3152a3f SHA-256: 1f0fab01ed486da7129b5796db7dc47b7cf49c5881b428c19051274494f69203
94 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The ML classifier also strongly indicated maliciousness. The embedded URLs suggest a link farm or redirection scheme designed to lead users to potentially harmful content or further stages of an attack. No scripts were extracted, and the document body is largely unreadable, making the link farm the primary indicator of malicious 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://ferristechhelp.com.au/uploads/1/3/1/4/131406614/131406614.html#alabad+servidores+del+se%25C3%25B1or+letra
    • http://samanilegal.com/uploads/1/3/0/4/130488370/d6885b27a5.pdf
    • http://charlotteandcharlie.co.uk/uploads/1/3/0/8/130874295/b9758cd.pdf
    • http://treasureoftheworld.org/uploads/1/3/1/1/131164270/jidavepet.pdf
    • http://darlingdoulas.com/uploads/1/3/0/6/130639762/rutokigej.pdf
    • http://mail.setxafapa.org/uploads/1/3/0/7/130739385/8953132.pdf
    • http://40winks.world/uploads/1/3/0/4/130478307/piralun_difipexepe_posezege_nuwozad.pdf
    • http://mta-sts.mail.centralupyouthfootball.org/uploads/1/3/0/7/130739688/9751972.pdf
    • http://rchristieanimation.com/uploads/1/3/0/6/130605259/fogepel-kuxifin-renumef.pdf
    • http://cpanel.newenglandbusinesscenter.com/uploads/1/3/0/7/130775242/munabe.pdf
    • http://harrisonsolisatservices.com/uploads/1/3/0/8/130874559/demupedari.pdf
    • http://elevatedmorsel.com/uploads/1/3/0/5/130588203/pumasusi_lelobudusij.pdf
    • https://mubupemigiv.files.wordpress.com/2020/06/31055806795.pdf
    • https://remopar.files.wordpress.com/2020/06/18811408932.pdf
    • https://dojenus.files.wordpress.com/2020/06/rimoxinunelufidade.pdf
    • https://ronewodovuk.files.wordpress.com/2020/06/bogofilinomiganiz.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_off00004fee.bin
24ce002e00a656c1b094a7ca5a1024b43041b773b1f83cc14f6a1aafbec3a75d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4FEE 11280 bytes

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