Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4d5727a703deaac…

MALICIOUS

PDF

32.0 KB Created: 2020-05-14 11:37:10 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 29ecd33ccef3b15f3311b531d9b9c227 SHA-1: 839df64e07b30bf31fd44c73d68421112c6084ce SHA-256: d4d5727a703deaace8f32f917f7831f7b21110cf401da9f255c886da3d4776a1
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document 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 document body, though heavily obfuscated, contains references to URLs that are consistent with the link farm behavior. This suggests the primary purpose is to redirect users to a network of sites, likely for SEO manipulation or to serve malicious content.

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://betapiofiota.org/uploads/1/3/0/5/130588763/130588763.html#arvind+akela+movie+song
    • http://pbrr.ca/uploads/1/3/0/5/130588727/bivezavojupidolaju.pdf
    • http://knotandgrains.com/uploads/1/3/0/5/130539442/c897ab6c1be.pdf
    • http://mayadesaischolarship.com/uploads/1/3/1/3/131382583/lamezu-sufepamovu.pdf
    • http://maxessystems.com/uploads/1/3/1/3/131398015/vifijojukawifatoni.pdf
    • http://thethoughtfulkitchen.net/uploads/1/3/1/0/131070173/foxegesotu.pdf
    • http://everydayfake.com/uploads/1/3/0/4/130477775/sexin.pdf
    • http://baileyfatormassage.com/uploads/1/3/0/8/130874299/2410358.pdf
    • http://qweries.org/uploads/1/3/0/6/130621119/jasawud.pdf
    • http://gracebcpc.com/uploads/1/3/0/2/130291585/wovudav-zavojumumilas-vidubukavoxiv.pdf
    • http://kingkekeshop.club/uploads/1/3/1/3/131398221/komoduxagejuxazo.pdf
    • http://buramarkit.net/uploads/1/3/1/4/131483391/migakanugume.pdf
    • http://rrteff.com/uploads/1/3/0/5/130588685/9445105.pdf
    • http://rimrepairdetroit.com/uploads/1/3/0/4/130488410/dikoz.pdf
    • http://susanjenksdesign.com/uploads/1/3/0/4/130483679/f0baa.pdf
    • http://redeespacosaboroso.com/uploads/1/3/0/7/130738974/2569616.pdf
    • http://vamospapitennis.com/uploads/1/3/1/6/131637046/5507854.pdf
    • http://omwin88.com/uploads/1/3/1/4/131437261/3123165.pdf
    • http://golden-eye.org/uploads/1/3/1/3/131384609/vuladuboduk_rapadafi_zuvalixapemoru.pdf
    • http://gearnet.xyz/uploads/1/3/0/2/130289549/4510167.pdf
    • http://lombergames.com/uploads/1/3/0/2/130271185/dimined.pdf
    • http://rolfverhoeven.nl/uploads/1/3/0/3/130379431/7801140.pdf
    • http://cornucopia-vintage.com/uploads/1/3/0/6/130603761/fewemurovuzizujuzode.pdf
    • http://weddingphotographyhamilton.ca/uploads/1/3/0/5/130588240/31046a2f3782161.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_off0000549b.bin
33f4eba563b7dabbf8cb5532aa873095653fc9b224df7ea23e1b11ad1cc21676
pdf-font-stream PDF embedded font (sfnt) at offset 0x549B 9332 bytes