Malicious PDF — malware analysis report

Static analysis result for SHA-256 d93d385de993604a…

MALICIOUS

PDF

44.0 KB Created: 2020-04-11 07:41:06 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: ed6eaf84029b1d51fa1bdab129601228 SHA-1: f83f4f06c74b2f5d6457b248cdc8245853bba3a4 SHA-256: d93d385de993604abc4e1f1e1f9c455435824758427b848cedf0cec76c5fc1d1
96 Risk Score

Malware Insights

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

This PDF file was flagged by an ML classifier as malicious. It contains a large number of external links, many of which point to similarly structured URLs on different domains, suggesting a link farm or SEO abuse tactic. The primary purpose appears to be redirecting users to a network of websites, likely to deliver further malicious content or phishing pages. 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://rochecenter.org/uploads/1/3/1/3/131380811/131380811.html#list+of+spanish+adjectives+pdf
    • http://rui-monteiro.com/uploads/1/3/0/4/130476215/bozip-firisevetalu-gaduxoragutod.pdf
    • http://onesingleflock.com/uploads/1/3/0/4/130491271/vawinim_gunumigusuri_rezupeguvojipam_raxibavovejoxa.pdf
    • http://loveempowered.me/uploads/1/3/1/6/131606223/tuziduvedob.pdf
    • http://improvehertomorrow.org/uploads/1/3/1/0/131070799/zutid.pdf
    • http://fuegoclubsf.com/uploads/1/3/0/8/130873864/4666162.pdf
    • http://thriveequinerescue.org/uploads/1/3/1/4/131406821/0ade0ba16.pdf
    • http://picturethebooth.net/uploads/1/3/1/3/131379163/raginalus.pdf
    • http://checkthe.net/uploads/1/3/0/5/130550912/nisavoru-loboxowekum.pdf
    • http://magnoliamarketing.org/uploads/1/3/0/3/130313320/4712066.pdf
    • http://dalestreetbridge.com/uploads/1/3/1/4/131453706/a9fd48b6ec.pdf
    • http://vftni.org/uploads/1/3/0/5/130590205/rixelupuso.pdf
    • http://stockcity.org/uploads/1/3/1/4/131438176/9643007.pdf
    • http://sunnylevi.com/uploads/1/3/0/4/130477864/puwupa.pdf
    • http://cinderellacares.com/uploads/1/3/0/6/130621446/mubunejula.pdf
    • http://mind4age.org/uploads/1/3/1/3/131380723/1cc5728c1b7a.pdf
    • http://dalestreetbridge.com/uploads/1/3/1/4/131453706/a9fd48b
    • 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_off000081b1.bin
c5f880c7ce1fff7071e17ad7d24250afc8fdbfb85e320e20324842240bd48ca3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81B1 8968 bytes

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