Malicious PDF — malware analysis report

Static analysis result for SHA-256 60c80afa629bfa10…

MALICIOUS

PDF

44.5 KB Created: 2020-04-01 18:21:34 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 32ea911894a88c17d9eaab30829b07d1 SHA-1: 77d9ba95d4034ab8705c33adbb6a2154c34ce7c1 SHA-256: 60c80afa629bfa10f6205c6e7eb3c9deaad5d0c2cbc9d935b9df19abbda9ae90
96 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. The document body, though partially corrupted, contains text suggesting it is related to philosophy books, which is likely a lure. The primary function appears to be directing users to a vast network of linked PDF files hosted on various domains, potentially for SEO spam or to distribute further malicious content. No scripts were extracted, but the presence of numerous external links suggests a malicious intent to redirect users.

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://sikhster.com/uploads/1/3/0/6/130639419/130639419.html#historia+de+la+filosofia+libros+recomendados
    • http://aaafamilymove.com/uploads/1/3/0/6/130640107/7804983.pdf
    • http://lakeoswegobass.com/uploads/1/3/1/4/131410167/e9ad261e4e.pdf
    • http://stoneparkhoa.com/uploads/1/3/0/5/130544898/6990955.pdf
    • http://occupassion.co/uploads/1/3/0/8/130874529/2837127.pdf
    • http://oliviarosepaperco.com/uploads/1/3/0/5/130550992/jatef_rixederubiri_mijajofigijil_zisudagu.pdf
    • http://rxalens.net/uploads/1/3/0/6/130620878/8373090.pdf
    • http://mobilecardetailingsimivalley.com/uploads/1/3/1/0/131070798/guzuxirowojim_zowupukiwapin_vesup_vawidulomanodaf.pdf
    • http://ufadducmatriz.org/uploads/1/3/0/7/130740378/b2d2c7a8251997.pdf
    • http://amurphyjourney.com/uploads/1/3/0/6/130603926/1691625.pdf
    • http://21stcenturyacademy.info/uploads/1/3/0/6/130639883/1540522.pdf
    • http://adcounselling.net/uploads/1/3/0/3/130313132/16d21de7b8e228.pdf
    • http://arteclara.com/uploads/1/3/0/7/130775123/pulotixi.pdf
    • http://projecttransaction.com/uploads/1/3/0/7/130775346/gurosegozi.pdf
    • http://ahastay.net/uploads/1/3/0/9/130969925/c482320.pdf
    • http://dollarsignapparel.com/uploads/1/3/0/5/130550882/wosasakavasa.pdf
    • http://livingrichnow.net/uploads/1/3/0/7/130775029/liboxaparunen_zejojolexaraxi.pdf
    • http://ifixicell.com/uploads/1/3/0/8/130874183/1ea65e2295.pdf
    • http://zaysplace.com/uploads/1/3/0/5/130589000/gamiroruji_meverafasuli_dimofepo_digekesilitod.pdf
    • http://savcreative.com/uploads/1/3/0/6/130605149/4976ff90710.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_off00007f0d.bin
06bee14b60d2f9b79222943c64e6711c4a6f1f0940ab72101fbca1c8c9d8e503		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F0D 10052 bytes

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