Malicious PDF — malware analysis report

Static analysis result for SHA-256 1041bf10d0e7d505…

MALICIOUS

PDF

58.1 KB Created: 2020-03-21 17:02:19 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: dac9749fd0380d27e38e5b1668de1a04 SHA-1: 0184a2a986d758b77393542a20ca170c77476c22 SHA-256: 1041bf10d0e7d50593c77345e536b528c8dbbb18786f4d27e2c549b34a8acba0
96 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of a link farm or SEO spam, embedding a large number of external URLs. The ML classifier strongly indicated maliciousness, and the PDF structure suggests an attempt to direct users to potentially harmful content hosted on numerous domains. No scripts were extracted, but the sheer volume of embedded links points to a malicious intent to manipulate search results or distribute 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://coppersite.com/uploads/1/3/0/7/130739978/130739978.html#holding+everything+else+constant+an+increase+in+the+price+of+mp3+players
    • http://alderearlycollege.org/uploads/1/3/0/2/130289681/bd2f7a84e5b103.pdf
    • http://kingsandqueenschess.com/uploads/1/3/0/7/130738662/wativekurureg.pdf
    • http://www.anastasiadorsey.com/uploads/1/3/0/6/130604198/vesegopogebijunapun.pdf
    • http://blueponyinn.com/uploads/1/3/0/9/130969339/f0ab848c7f.pdf
    • http://organicliceguru.us/uploads/1/3/0/9/130969841/f21b270124.pdf
    • http://ohiostatesme.com/uploads/1/3/0/8/130874257/xetevirasu.pdf
    • http://valhalladogtraining.com/uploads/1/3/0/3/130312976/4736626.pdf
    • http://arborcaretreeservices.net/uploads/1/3/0/5/130588681/5476c1.pdf
    • http://channayath.com/uploads/1/3/0/2/130288731/gefomulesujigix.pdf
    • http://sfgflooring.co.uk/uploads/1/3/0/7/130776370/vezafisubogadul.pdf
    • http://elevate-data.com/uploads/1/3/0/2/130289719/2078190.pdf
    • http://homeopathic-health-care.com/uploads/1/3/0/5/130588622/cdad0920ee9.pdf
    • http://bamboozleapp.com/uploads/1/3/0/3/130379087/10f148c69.pdf
    • http://viamediapromos.com/uploads/1/3/0/4/130483200/xugot.pdf
    • http://finaldraftedits.com/uploads/1/3/0/5/130547884/bd2d1.pdf
    • http://members.aaoc.com/uploads/1/3/0/5/130588199/c7e1e5a253492.pdf
    • http://tools.pokingdeadthings.com/uploads/1/3/0/8/130873786/2608561.pdf
    • http://philosophyofmanagement204828.com/uploads/1/3/0/8/130874007/zizibivuxidi.pdf
    • http://intraterrestrial.net/uploads/1/3/0/4/130477414/0f4cd535cd.pdf
    • http://www.swallowshecapio2019.com/uploads/1/3/0/6/130603684/tanuluzixo.pdf
    • http://coppercoastcare.services/uploads/1/3/0/8/130874038/luvekapegobogix_tavovel_sigiparejebevaj_letidunejuru.pdf
    • http://kristencathey.com/uploads/1/3/0/6/130604876/4602062.pdf
    • http://www.aacapone.com/uploads/1/3/0/2/130289304/71c617c3.pdf
    • http://www.mainplanet.org/uploads/1/3/0/6/130639052/nefibe.pdf
    • http://hostmaster.bournevalleychurches.org.uk/uploads/1/3/0/4/130476661/4b333133c8d.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_off0000b9da.bin
1e30f5eff8b0d1190008d50593f4893943ed60c8135d578dbaa8f2be5bbfe78f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB9DA 8160 bytes

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