Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1c2d9c4ff4aced6…

MALICIOUS

PDF

45.2 KB Created: 2020-03-30 22:07:17 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: ec032f32c7843e884eada8eea15e14c4 SHA-1: d1e2c1b26dc72cc6ae49666444c7ac006b9473a8 SHA-256: b1c2d9c4ff4aced68cd23e0d57a2a9bdd8e369e92428e9fe54635e8d5bc43b05
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which are numerically or generically named PDFs hosted on various domains. The document body text, though partially corrupted, includes a reference to 'Wendy's jalapeno burger nutrition facts' and the wkhtmltopdf generator, suggesting a lure to disguise the malicious intent. The primary heuristic 'PDF_SEO_LINK_FARM' indicates a technique to generate traffic or distribute content through a large number of SEO-optimized links. The ML classifier strongly flagged this PDF as malicious.

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://bejustalittlebetter.com/uploads/1/3/1/3/131380453/131380453.html#wendy%27s+jalapeno+burger+nutrition+facts
    • http://pittwaterrugby.org/uploads/1/3/0/2/130273753/boveveniju.pdf
    • http://dressscore.com/uploads/1/3/0/9/130969060/d4e6003.pdf
    • http://autodiscover.friends-school.org/uploads/1/3/0/2/130289161/20a795e1.pdf
    • http://blue-ridge-greens.com/uploads/1/3/0/7/130775205/xezewupakam-xamokube-siwimenaruji.pdf
    • http://gpacostruzioni.com/uploads/1/3/1/4/131406049/9902592.pdf
    • http://bettertvbuys.com/uploads/1/3/1/4/131456320/zofojemukeni_mogujisawuxoxu_xademofumumosu_nuxabolemedu.pdf
    • http://rabbitmountainlavender.com/uploads/1/3/0/9/130969748/xasuxidigiroze-mabidurexep-mafebifuvusabig-jupuxateze.pdf
    • http://tonebabyrecords.com/uploads/1/3/0/4/130435729/davil_koluzigamujuxa.pdf
    • http://polycustomsautos.com/uploads/1/3/0/4/130490181/eeaa13c7c37.pdf
    • http://righteouscuisine.net/uploads/1/3/0/5/130589238/f945047.pdf
    • http://taylorstudios.net/uploads/1/3/1/3/131398348/5105393.pdf
    • http://northtexas.net/uploads/1/3/0/6/130639563/8738760.pdf
    • http://blissmassage.ca/uploads/1/3/0/3/130313192/finebix_kidox.pdf
    • http://sandiegovolleyballcamp.com/uploads/1/3/0/3/130313471/7239932.pdf
    • http://newimagetreeandgardenservices.com/uploads/1/3/0/8/130813601/resubidu_vageduraju_tasatupopemi.pdf
    • http://pkeefedurso.com/uploads/1/3/0/7/130739430/bosapivipikefiz.pdf
    • http://securitservices.net/uploads/1/3/0/6/130604024/luzilumikinoga-kirezamamez.pdf
    • http://seanoneillglass.com/uploads/1/3/0/4/130476519/5213921.pdf
    • http://legaciesmentoring.com/uploads/1/3/0/7/130774964/sarovudogute.pdf
    • http://jakebjazz.com/uploads/1/3/0/6/130639865/3db59719ef6da.pdf
    • http://cristinacoppini.com/uploads/1/3/0/6/130639524/wulesipirudo.pdf
    • http://ascendautomation.org/uploads/1/3/0/2/130287314/bf7b823f406577.pdf
    • http://stop-roken-coach.nl/uploads/1/3/0/2/130287894/kidanesi-firovetifuzej.pdf
    • http://tillylawfirmmd.com/uploads/1/3/0/6/130640081/xuvoxabotabibore.pdf
    • http://stop-roke
    • 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_off000085ce.bin
64d31bfcab8030363fa6fd0f58102e44ee0904a985396c03d97dbdf367f93bed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85CE 8788 bytes

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