Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf3a274f3bfa0d04…

MALICIOUS

PDF

39.2 KB Created: 2020-04-02 06:48:35 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: f1f0d49286a73c0d086af6d49ca3f4fc SHA-1: 7a8c663af9a339421221360f754ff1ff6b853675 SHA-256: cf3a274f3bfa0d04ac9da1e57276d143b6fa46a7918b51833a9f3029811d05d2
94 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, a technique often used for SEO spam or to distribute further malicious content. The ML classifier strongly indicated maliciousness. No scripts were extracted, but the sheer volume of outbound links suggests a high likelihood of malicious intent, possibly to redirect users to phishing sites or malware downloaders.

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://johnymoore.com/uploads/1/3/0/6/130620769/130620769.html#boy+scout+winter+sports+merit+badge
    • http://fashionapparelandsk.com/uploads/1/3/1/0/131071315/834942.pdf
    • http://boskgame.com/uploads/1/3/1/3/131381519/6094070.pdf
    • http://fredeng.net/uploads/1/3/0/7/130776516/2902143.pdf
    • http://nycartsed.com/uploads/1/3/0/4/130436014/kimat_pokazud_jujurorujit_vulasopa.pdf
    • http://pourvoiriefrenchconnection.com/uploads/1/3/0/8/130814060/zodigefimebinusi.pdf
    • http://mexicoluminaria.com/uploads/1/3/0/3/130323260/rafepaveket-segeba-wexogejetigise-bitug.pdf
    • http://dazzeauxs.com/uploads/1/3/0/4/130488322/7321892.pdf
    • http://5elementsart.com/uploads/1/3/0/2/130287289/1862092.pdf
    • http://mudgeeproduceplus.net/uploads/1/3/0/6/130604949/nirutajij-mevumisekamulot.pdf
    • http://burkewindowreplacement.com/uploads/1/3/0/4/130476308/wabanavider_dinejokaserew.pdf
    • http://mindfulnessofmid-michigan.com/uploads/1/3/0/7/130775034/misalexepizag_rotose.pdf
    • http://capehousebbnotl.com/uploads/1/3/0/3/130379210/mutizipoxi.pdf
    • http://emcsdesigns.com/uploads/1/3/1/1/131164156/zimefovovaw.pdf
    • http://orgmentum.com/uploads/1/3/0/9/130969077/gilesikudatisaz_vamat_tasitogedokika_digoxixutiven.pdf
    • http://bardswine.com/uploads/1/3/0/6/130603828/sovun.pdf
    • http://jamesagibson.com/uploads/1/3/0/8/130813948/0a0b3ff6517dce2.pdf
    • http://estlife.eu/uploads/1/3/1/3/131379559/jupimegi_soworijanako.pdf
    • http://jonnysdesignercloset.com/uploads/1/3/1/0/131070576/66393d.pdf
    • http://diegojones.com/uploads/1/3/0/2/130289640/bikulaku.pdf
    • http://orangecountypeaceofficersassociation.com/uploads/1/3/0/3/130323908/suvagepuxawagorafun.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_off00007184.bin
ac4d276b84d91355827fac08baa2815b587d55f434507e2a5e104bf1490de61b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7184 7556 bytes

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