Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1830008f7e2e226…

MALICIOUS

PDF

72.9 KB Created: 2021-02-17 00:15:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 02070b8f29b0cfc2c79bd1c28bb37682 SHA-1: 8055aaf0dda35dcf2080e01b96873cc113bae627 SHA-256: b1830008f7e2e2268fa6c989d94b7dcd84a4a5ede1d75ea82eeb124433e9fda0
126 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with at least two pointing to suspicious domains ('jottigo.ru' and 'pukogika.iblogger.org') that are part of a link farm, suggesting a phishing or malware distribution scheme. The document body, though heavily obfuscated, appears to contain text related to downloading images, potentially a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=can+i+download+images+from+wordpress+media+library PDF link annotation
    • http://pukogika.iblogger.org/fortnite_season_6_week_6_challenges_guide.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408851/normal_5fdc23c6ad727.pdfIn PDF document text
    • https://gixakipero.weebly.com/uploads/1/3/1/4/131412713/tofiputadomuwe.pdfIn PDF document text
    • http://cocobuka3.xyz/5180422745773vht.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488316/normal_601a2e9aa0355.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411493/normal_5fe80dc0d4fe3.pdfIn PDF document text
    • http://slmit.fun/gatanujiliemhl8.pdfIn PDF document text
    • https://cdn.sqhk.co/tokarikadez/ggibRgj/budizowizejefupusoj.pdfIn PDF document text
    • http://pawaridifos.iblogger.org/kesujo.pdfIn PDF document text
    • https://fawurefo.weebly.com/uploads/1/3/4/4/134441885/mafas_kanakerokefagis.pdfIn PDF document text
    • http://urott-hu.com/ptcb_exam_study_guideb4ydv.pdfIn PDF document text
    • https://cdn.sqhk.co/bupedamarib/ghcgfr9/duluzixonejomibexigusez.pdfIn PDF document text
    • https://denupadifujufo.weebly.com/uploads/1/3/0/8/130813478/3144820.pdfIn PDF document text
    • https://cdn.sqhk.co/tisufupujeli/Jicigin/cnc_screen_correspond_to_fanuc.pdfIn PDF document text
    • https://cdn.sqhk.co/merojuniv/lsbGojg/47453694821.pdfIn PDF document text
    • https://xinefozi.weebly.com/uploads/1/3/0/7/130775465/wufuvupirajapob.pdfIn PDF document text
    • http://medicinfo.online/tasamix5v7up.pdfIn PDF document text
    • http://yatvoyya.fun/soundcloud_music_free_online5lkij.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gujusama.rf.gd/borland_pascal_7.pdfIn PDF document text
    • http://suvokejixu.epizy.com/english_language_teaching_materials_free.pdfIn PDF document text
    • https://s3.amazonaws.com/babuxufarizuxur/57093393590.pdfIn PDF document text
    • https://s3.amazonaws.com/warapagefasovi/97782069577.pdfIn PDF document text
    • https://s3.amazonaws.com/feborobegibew/jidafulumode.pdfIn PDF document text
    • https://s3.amazonaws.com/dorobukasawituw/dedokuxuxo.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_off0000decc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDECC 5600 bytes
SHA-256: 1cb7736e14a87533ff82e31cdf58aac14d40f1e39b7068adf2c3b24a18c4e71a
font_01_sfnt_off0000f1d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1D2 10556 bytes
SHA-256: adb14881193f914b455b195845e1d836626ab890031716050590cc82b5eb0764

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