Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e9c15ab72d7a113…

MALICIOUS

PDF

75.3 KB Created: 2021-02-19 15:15:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 79a3c56e1ef06ff039ed9b624a27a04f SHA-1: 9c84a9eb13f3659fb0439035098dde6b4b55ac8c SHA-256: 9e9c15ab72d7a11356787a555ee290d915eedc15e3209f75b5e5e0fd2c41d10e
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable domains and are likely used for phishing or malware distribution. Heuristics indicate it's a link farm on disposable hosting, and ClamAV detected it as a phishing trojan. The ML classifier also flagged it as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 https://jottigo.ru/123?utm_term=5e+action+economy+cheat+sheet PDF link annotation
    • https://cdn.sqhk.co/jaselavujuwi/hdpFlpg/sodilizotelaburadodemawen.pdfIn PDF document text
    • https://cdn.sqhk.co/guxuboru/idggitY/precio_del_pase_elite_free_fire.pdfIn PDF document text
    • http://yogist.fun/fafezinegupamipulixonirx1zv.pdfIn PDF document text
    • https://cdn.sqhk.co/tamurikubol/zhdjfgj/tododixojufisimuwepulimap.pdfIn PDF document text
    • http://cetapp.xyz/what_does_you_mean_man_of_the_houseman_dowvady.pdfIn PDF document text
    • https://laregupofonel.weebly.com/uploads/1/3/4/4/134464195/5caedced72a1.pdfIn PDF document text
    • http://naturapple.space/makkar_ielts_speaking_topics_2019_with_answers_free_download87vwa.pdfIn PDF document text
    • http://cybety.xyz/schema_electrique_logiciel_macxonpn.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366050/normal_602b3540f0970.pdfIn PDF document text
    • http://smartcoin.design/solucionario_libro_biologia_y_geologia_3_eso_sm_savia29y1n.pdfIn PDF document text
    • http://itravelgr.com/wulixuvul08z6f.pdfIn PDF document text
    • https://tavutafaj.weebly.com/uploads/1/3/1/4/131482866/da706.pdfIn PDF document text
    • http://susurrus.space/befopakuxabafebekivawiwazlf1r.pdfIn PDF document text
    • https://cdn.sqhk.co/dafibuxoki/geHgiW5/53027922739.pdfIn PDF document text
    • http://endi-itali.space/xivubejavokwtfq2.pdfIn PDF document text
    • https://cheatography.comIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vimiromomekex.epizy.com/rilevijibuxegefu.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eaf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAF6 5044 bytes
SHA-256: 8d3c41cabc571abff6432937a27a998a6cfb74eb7746bc0c02dda5a8810411d2
font_01_sfnt_off0000fc07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC07 10652 bytes
SHA-256: 7d3e8b6e8fd50c49f46572417c2cba404c019f79d3bc3473c819a89b16b0d86e

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