Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8885d2e57924863…

MALICIOUS

PDF

46.9 KB Created: 2020-03-12 11:00:25 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: de10f124b97823f42d93f746787b850a SHA-1: e189f1069482032f692af0cbb24d825962758e1c SHA-256: f8885d2e57924863e4f983dddcbf2f363c777c41faeb2a5ebc39303456beded3
94 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The ML classifier also strongly indicated maliciousness. The document body, though partially corrupted, contains references to these external URLs, suggesting a coordinated effort to distribute content or manipulate search engine results. No scripts were extracted from this sample.

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://vps20.pleasingfood.com/uploads/1/3/0/6/130604521/130604521.html#functional+specification+document+software+development
    • http://marylandfarmstx.com/uploads/1/3/0/5/130539370/vuxon-guvukomijigedi-gafimepejunazuk.pdf
    • http://flygirlfitness.com/uploads/1/3/0/4/130494871/2944006.pdf
    • http://datenightporn.com/uploads/1/3/0/3/130379625/18332.pdf
    • http://ezoats.com/uploads/1/3/0/3/130323630/3675209.pdf
    • http://www.custommadebyalexis.com/uploads/1/3/0/6/130605306/101bb96f6bf41.pdf
    • http://ooshguy.com/uploads/1/3/0/5/130539092/6952942.pdf
    • http://voyageofthedawncaster.com/uploads/1/3/0/9/130969089/8f090d.pdf
    • http://24baltimore.com/uploads/1/3/0/7/130738841/xoxudukori.pdf
    • http://byelliott.com/uploads/1/3/0/6/130603715/bubexogag.pdf
    • http://squidbitches.com/uploads/1/3/0/3/130313176/5682457.pdf
    • http://seelooinc.com/uploads/1/3/0/7/130739540/2350280.pdf
    • http://sparklingpolish.net/uploads/1/3/0/5/130588560/zupolup_mixebaz.pdf
    • http://reptilerescueandremovalservice.com/uploads/1/3/0/5/130552043/7604390.pdf
    • http://bellzclothing.com/uploads/1/3/0/5/130589423/1073730.pdf
    • http://photolenka.com/uploads/1/3/0/5/130538953/jukizivaxanorowani.pdf
    • http://mccarterfamilytn.com/uploads/1/3/0/6/130620416/kulesevolazav.pdf
    • http://estructurascorporativas.com/uploads/1/3/0/5/130546024/xusisinepaka_lilemowodaga_dalegosud_tibukiwutaboka.pdf
    • http://untroubledminds.com/uploads/1/3/0/7/130740553/978bf276d1615c.pdf
    • http://offthegrid24.com/uploads/1/3/0/6/130604529/2888174.pdf
    • http://www.routtcountyveterans.com/uploads/1/3/0/2/130288310/powupituz.pdf
    • http://valleycreekcustomdesigns.com/uploads/1/3/0/6/130621874/gaxamolodepaw_peluretasoxusi_fojif_lebumazawi.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_off00008cd8.bin
642b4068fd3911505e5cb5dda48d898b9d992de10cd547b0a3eb8c60b3d866b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CD8 8484 bytes

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