Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bd5c9a4cbae73fc…

MALICIOUS

PDF

44.6 KB Created: 2020-04-02 03:12:14 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 3c29dbd3460504a595e372b0913a9128 SHA-1: b4313646ab7eaa627b3fe0123de97f889ff912cd SHA-256: 6bd5c9a4cbae73fccb154563ccbe8c451e5bb7b58e42e8d3ff72ac78b227bb6e
96 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various PDF files hosted on different domains, suggesting a link farm or distribution mechanism. While no scripts were explicitly extracted, the presence of numerous external URLs and the ML_NYX_PDF_MALICIOUS firing indicate a high likelihood of malicious intent, possibly for SEO manipulation or to serve further payloads.

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://qsmobilemassage.com/uploads/1/3/0/5/130544790/130544790.html#leyes+de+movimiento+de+newton+para+ni%C3%B1os
    • http://myonlinefashionmary.com/uploads/1/3/0/8/130873853/2569891.pdf
    • http://helping-those-in-need.com/uploads/1/3/1/3/131398380/6651462.pdf
    • http://myclass-c-motorhome.com/uploads/1/3/1/3/131380094/256301241.pdf
    • http://ritchierockmcbride.com/uploads/1/3/1/4/131406977/2205965.pdf
    • http://premierarchsheetmetalinc.com/uploads/1/3/0/6/130621123/vekaxuvizifibeki.pdf
    • http://camp720.com/uploads/1/3/1/4/131408502/wufoxiliwexa_xizuvifuzu.pdf
    • http://mikkinicolecollextion.com/uploads/1/3/0/4/130475994/dexid.pdf
    • http://iicforsuccess.org/uploads/1/3/0/8/130813381/7e1c690373.pdf
    • http://delraydecorations.us/uploads/1/3/0/6/130620510/rixonesi.pdf
    • http://innovacionpublicitariamagenta.com/uploads/1/3/0/5/130551536/44316e4257.pdf
    • http://milgens.com/uploads/1/3/0/4/130476483/1936529.pdf
    • http://jokatywelch.com/uploads/1/3/0/3/130313507/jebujategojakoru.pdf
    • http://flawlessskincarewpg.com/uploads/1/3/0/7/130774969/ruvobivosu.pdf
    • http://myfureverfrenchie.com/uploads/1/3/0/9/130969764/pasutoburixo_pigedobajapap_jaweriz.pdf
    • http://prayingforreign.com/uploads/1/3/0/7/130775997/d9e4526c.pdf
    • http://drawing-bored.com/uploads/1/3/1/1/131163536/puvefoviturudo.pdf
    • http://my2cor517.com/uploads/1/3/1/1/131164382/fukotemijujid_nibinaziriputed_wolivixeturina.pdf
    • http://weloveanimalsrescue.com/uploads/1/3/1/3/131381480/9864382.pdf
    • http://designsbydanakaye.com/uploads/1/3/0/4/130477036/8767ebebd.pdf
    • http://youngsfamilyfurnishings.com/uploads/1/3/0/4/130483205/5498984.pdf
    • http://wmaxconsulting.com/uploads/1/3/0/6/130639565/59719a174d9a.pdf
    • http://krivak.com/uploads/1/3/0/3/130323405/muxamiso_nogigitozo_voluvan.pdf
    • http://nuexquisitevents.com/uploads/1/3/0/9/130969648/gulabobifil_jezutabaperim.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_off00008283.bin
8051864bf966ecf2ac422be1545cd178437b00de2b00940661c55ead0fd51999		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8283 8716 bytes

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