Malicious PDF — malware analysis report

Static analysis result for SHA-256 45843fb7f8c8b233…

MALICIOUS

PDF

33.0 KB Created: 2020-05-01 07:07:10 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 3274bb70145720ce95e1b1738470a246 SHA-1: 1bb49e194a4a2e2314e57995c9823d804fd767bd SHA-256: 45843fb7f8c8b2334409778df5f39e09ebc263c47e4461f6859d272f62838a13
94 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which are dynamically generated and point to PDF files. The document body contains a title that appears to be a lure, and the embedded URLs are likely used to redirect users to malicious content or phishing pages. The ML classifier strongly indicated maliciousness.

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://teamgls.com/uploads/1/3/1/1/131163904/131163904.html#shimla+tha+ghar+unka+hd+video
    • http://capitalmarketsskisummit.com/uploads/1/3/0/4/130488179/f76558cc658c05.pdf
    • http://atlantamoveme.com/uploads/1/3/0/2/130287538/gevubuli-kofubodisi-muzugafefuka.pdf
    • http://droneswrx.com/uploads/1/3/1/3/131383763/6988696.pdf
    • http://vshardwoodfloorsllc.net/uploads/1/3/0/6/130605190/7811364.pdf
    • http://wenqi-luo.com/uploads/1/3/0/7/130739280/lidikemedibotetopag.pdf
    • http://drivony.com/uploads/1/3/0/5/130543685/166278.pdf
    • http://christinathieleyancy.com/uploads/1/3/0/6/130604335/366691.pdf
    • http://dynamicslogic.com/uploads/1/3/0/3/130379232/wejomevamut.pdf
    • http://yirehhealth.net/uploads/1/3/0/7/130739693/6b274.pdf
    • http://theatlantasnob.com/uploads/1/3/0/5/130588567/289394.pdf
    • http://aegisve.com/uploads/1/3/0/6/130605255/delaxi-pelojiner-dodeverusa.pdf
    • http://cibrealestate.com/uploads/1/3/0/8/130814101/mozubupa_wemozatuxoju.pdf
    • http://ilovelanguageartsclass.com/uploads/1/3/0/3/130379407/kowuvikepesip-ziduxanesudul-dixaxu.pdf
    • http://skintuitionspa.com/uploads/1/3/0/5/130545581/1147182.pdf
    • http://inspiredchic.net/uploads/1/3/0/3/130379921/ziwofosetu_suruxifoxe_rameku_fomiropedovubaj.pdf
    • http://hootynpeaches.com/uploads/1/3/1/6/131637723/dasur.pdf
    • http://ilovemoostudios.com/uploads/1/3/0/6/130620890/bivuxav.pdf
    • http://lalaartists.com/uploads/1/3/0/5/130590339/xodiz_ximewa.pdf
    • http://organizatingforaction.com/uploads/1/3/1/4/131438071/nanujawus-logigoxerov-kedalenano.pdf
    • http://flirtboutique.shop/uploads/1/3/0/5/130540280/e00ced2.pdf
    • http://socksondemand.com/uploads/1/3/0/5/130589124/gebewokil-kukirajel-wadimudizos-ramaju.pdf
    • http://skintuitionspa.com/upload
    • 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_off00005b8f.bin
0e3026c2d0d548358a2ed08aead42eb87c171b7a7ea1790106bacac0f55082c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B8F 7000 bytes

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