Malicious PDF — malware analysis report

Static analysis result for SHA-256 030c123a56b0bc3f…

MALICIOUS

PDF

122.0 KB Created: 2021-04-02 11:27:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ca45fc035f2a881747b8d6839d40d1c4 SHA-1: 5d8d4d57d1c0519c58c2a32a2e8202c19d2cd099 SHA-256: 030c123a56b0bc3fe2b19b734a877fd6cbf57c89cb17cdee34b8cdfc7724e9f7
196 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which are SEO-optimized and point to other PDF files, suggesting a link farm or phishing operation. The heuristic 'SE_ADVANCE_FEE_SCAM_LURE' indicates the document's content is designed to trick users into believing they are involved in a lottery or prize, requiring them to pay fees or provide information. While no scripts were explicitly extracted, the presence of numerous external URLs and the nature of the heuristics strongly suggest a phishing or advance-fee fraud campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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 https://jacksth.ru/award?keyword=biostatistics+analysis+of+variance+pdf
    • http://yogist.fun/gajafuxanezozokunavikklkv.pdf
    • https://cdn.sqhk.co/kenixidoxexi/LrMhdhj/94709432915.pdf
    • https://kefawefixak.weebly.com/uploads/1/3/0/7/130738991/vimixurajem.pdf
    • https://cdn.sqhk.co/sekigizakeku/jgXiaja/nepexipopafenedotos.pdf
    • https://duranato.weebly.com/uploads/1/3/1/4/131453267/rojitopobesazutibe.pdf
    • http://arendagg.xyz/87882378736dorhs.pdf
    • http://werenntaq.online/63369172848itb8a.pdf
    • https://cdn.sqhk.co/kapapomabu/aJififJ/91085218690.pdf
    • http://goldenframecollision.com/problemas_de_notacion_cientifica_resueltost2qw5.pdf
    • https://cdn.sqhk.co/niririga/eLIGiae/bloody_harry_apk_mod.pdf
    • http://ludshop.xyz/sofims10ry.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://30b7a97f-6117-4fff-8876-4b3c2220b6c6.filesusr.com/ugd/15cd4d_ecbe6e56a06e497b838023df8fe46c20.pdf?index=true
    • http://buporuvigeboj.rf.gd/ninez.pdf
    • https://6b54b0b2-91db-43cc-88c8-bbc4f7e20b37.filesusr.com/ugd/a773aa_22bd34c56e4647ecb5fd7df2882e37d1.pdf?index=true
    • https://07f52280-50dc-49c2-beec-a2e30bf849d0.filesusr.com/ugd/7b8f90_bf019dcb4ce046ba8227827365052c7b.pdf?index=true
    • http://jokokitot.rf.gd/wikitidugarej.pdf
    • https://16771ef3-52d8-4bfb-9b99-9a12c5f35f3c.filesusr.com/ugd/89b1bc_20b58b9f686a4ba8a29bf9af0a425af5.pdf?index=true
    • https://4fe85328-8dbf-40e9-afa8-2c8d6ff8a9c8.filesusr.com/ugd/9c0842_210ca9fa319540aeade791f228a732be.pdf?index=true
    • https://e082cb0d-9c22-4a21-acb7-e2c6127a51d3.filesusr.com/ugd/ff0c06_cef50b9dceea4910b521c13de6c6f0ee.pdf?index=true
    • 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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001876b.bin
5bd55fd047a785f0e3460e4dc11ecb20c47e07e0a4e9df956ba60a2de8e6699e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1876B 5360 bytes
font_01_sfnt_off000199cb.bin
35a73a17fd4e1994ef524552bd32d1443c467c6190c463e1be3a5e04698fa8a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x199CB 12400 bytes
font_02_sfnt_off0001c3f7.bin
f710cd25758e6e5c6706683bee5d4ff637b63555e96cb89cdf5dddc7b3fc6e8c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1C3F7 16328 bytes

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