Malicious PDF — malware analysis report

Static analysis result for SHA-256 09261307c410c09b…

MALICIOUS

PDF

47.3 KB Created: 2020-03-20 13:19:18 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 0f478cd5f66dd81bf0609a90a715b579 SHA-1: b5064a617c3f0e3d9dafacfb2ec12053f88fe790 SHA-256: 09261307c410c09bf7bda7e1aa5ce33f17887db82c7d8d8117250ddbc9aa22af
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, identified as a link farm, suggesting an attempt to manipulate search engine results or redirect users to malicious content. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates that the document may also be instructing users to decrypt an archive, a common tactic to bypass gateway security. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://shopbelfast.info/uploads/1/3/0/7/130739154/130739154.html#caballo+de+troya+4+pdf
    • http://roxandree.com/uploads/1/3/0/5/130551718/wuzajutigajifabipuwa.pdf
    • http://kukuromance.com/uploads/1/3/0/6/130639309/daxazejojupu-madixuxigekorif-pusovig-zelenadogis.pdf
    • http://gspromocoeseventos.com/uploads/1/3/0/6/130603743/piloduv_vovezokomudar_xutezin_dakufu.pdf
    • http://htownskates.com/uploads/1/3/0/4/130476978/nuxevizegojumozinimo.pdf
    • http://stockbroker-fraud-lawyer.com/uploads/1/3/0/6/130604300/1388816c69a.pdf
    • http://brightpassiveincome.com/uploads/1/3/0/6/130605048/xudedifupamaf.pdf
    • http://www.viva6666.com/uploads/1/3/0/5/130590467/a7f65.pdf
    • http://nuortenasialla.eu/uploads/1/3/0/4/130483770/7508140.pdf
    • http://simsoup.com/uploads/1/3/0/4/130488875/214244.pdf
    • http://sponsorshipcollective.ca/uploads/1/3/0/8/130814682/a55e71660b2.pdf
    • http://www.ericaleejumps.com/uploads/1/3/0/4/130435937/zemilifogojanasepate.pdf
    • http://brends.net/uploads/1/3/0/6/130621755/perex.pdf
    • http://robotitechnologies.com/uploads/1/3/0/5/130589285/128200.pdf
    • http://divinjaskitchen.com/uploads/1/3/0/6/130639221/siwepugo-xaxazejujuxujo-buxoxuwidire-fakitixoka.pdf
    • http://midwestmale.com/uploads/1/3/0/7/130738704/fomep_liwajubod_dezuxadux_jogajakavim.pdf
    • http://neighborhoodinvolve.org/uploads/1/3/0/4/130475981/4e1af.pdf
    • http://royal-honeys.com/uploads/1/3/0/6/130620801/ed3dfdf.pdf
    • http://hostmaster.adulis.co.uk/uploads/1/3/0/8/130813768/teduwunexoxo_xodifetu_zokexovuga_gijiwinujakif.pdf
    • http://mta-sts.mail.eyesoftheworldfilms.com/uploads/1/3/0/5/130588705/0735de01bbfd2.pdf
    • http://ichunes.com/uploads/1/3/0/2/130289765/xowakatunutige-lozofoxizusena.pdf
    • http://smitchellelectrical.co.uk/uploads/1/3/0/7/130776591/7785170.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/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000077d3.bin
10dae39aca9a830969225c39d08e62818ebc7bae33548389ffafe4d3a0319509		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77D3 8948 bytes
font_01_sfnt_off0000988b.bin
f31c439e28d0137206b91a151f21343900f846ed9ff070250fbe82eb1cc7da1d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x988B 16204 bytes

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