Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a015592150a537c…

MALICIOUS

PDF

45.4 KB Created: 2020-03-27 05:50:06 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 1fdf831d2eca8bb3fad0d2f3f09c86a9 SHA-1: 5ae4b913957120d9969e847cad2917854af7a62b SHA-256: 1a015592150a537c192200e6d910beb844cfcd8d62bd38b1ee0d555098b503e2
94 Risk Score

Malware Insights

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

The PDF file was flagged by an ML classifier as malicious. It contains a large number of external links, many of which point to PDFs with numeric slugs, suggesting a link farm or SEO abuse tactic. The embedded document body text, while partially corrupted, includes a URL that also appears in the list of extracted URLs. The primary attack pattern observed is the embedding of numerous external links, likely to redirect users to malicious sites or for SEO manipulation.

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://switalia.com/uploads/1/3/0/7/130738740/130738740.html#thomas+hobbes+quotes+about+human+nature
    • http://jenniferkelleypottery.com/uploads/1/3/0/9/130970014/zijimas_wozovisinuxena.pdf
    • http://americanvetworks.org/uploads/1/3/0/8/130873804/9a720.pdf
    • http://hostmaster.beaconaccountancy.com/uploads/1/3/0/5/130550857/pepep.pdf
    • http://www.younique-you.com/uploads/1/3/0/2/130289317/7877509.pdf
    • http://speakvegangr.com/uploads/1/3/0/9/130968962/lofajupivubele.pdf
    • http://mari-ellenphotography.com/uploads/1/3/0/5/130540746/mufirirod-paroniwujazaxe-zupiz-duxabeked.pdf
    • http://garymellon.com/uploads/1/3/0/5/130550985/nevora-kokekewaxezivod.pdf
    • http://hostmaster.lcacupuncture.com/uploads/1/3/0/4/130436058/7a59719d.pdf
    • http://pottingercapital.com/uploads/1/3/0/3/130312957/62c42dab5264.pdf
    • http://optimabatterieshub.com/uploads/1/3/0/5/130541641/vaxiganetozesadunu.pdf
    • http://www.lawnservicewintergarden.net/uploads/1/3/0/3/130313306/xekumexupetom-borovovureratej-tifilelufogam.pdf
    • http://santeart.org/uploads/1/3/0/2/130289703/livofifasegomez-jepolupetuwaduk.pdf
    • http://opalgeovision.com/uploads/1/3/0/2/130274146/9974916.pdf
    • http://pumpkinvinecafe.com/uploads/1/3/0/2/130272575/wipozoleki.pdf
    • http://rcgdevelopments.com/uploads/1/3/0/3/130324440/tasapovuja.pdf
    • http://stevenvague.com/uploads/1/3/0/7/130739779/kamididumupax.pdf
    • http://daturafashion.com/uploads/1/3/0/7/130740077/rirejizufuwa.pdf
    • http://getcerakoted.com/uploads/1/3/0/5/130550763/5124824.pdf
    • http://christopherstangle.com/uploads/1/3/0/4/130436473/kiwovozu-pesaroja-fupipulabe-vawip.pdf
    • http://jinglenine.com/uploads/1/3/0/5/130544889/4076157.pdf
    • http://sideglide.com/uploads/1/3/0/5/130540472/7550595.pdf
    • http://allyourteeth.com/uploads/1/3/0/5/130543598/5944239.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_off00008946.bin
007dc4ecf0c1b8f2ca2837b52536fc5e07dd5e19d1acc7eef765f35b212fb453		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8946 7924 bytes

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