Malicious PDF — malware analysis report

Static analysis result for SHA-256 1170921edd20ab69…

MALICIOUS

PDF

87.8 KB Created: 2021-03-26 00:52:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 0f2607181472fdf4a4b6fcfafa907c47 SHA-1: 4ff0fa97aa22ecf11b0730a675082336e895d76f SHA-256: 1170921edd20ab69b0e8a08ffef075c22a11908c6753546b968e10dcfefa4149
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The presence of external URIs and the ML classification strongly suggest a malicious intent to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://resalured.ru/123?utm_term=logical+fallacies+identification+worksheet PDF link annotation
    • https://cdn.sqhk.co/lukejisuvawe/TGIzhgx/new_ringtone_samsung_galaxy_s8.pdfIn PDF document text
    • http://vuzosimerafi.iblogger.org/what_does_bert_say_in_mary_poppins.pdfIn PDF document text
    • http://tejowigasinafu.getenjoyment.net/42nd_amendment_act.pdfIn PDF document text
    • https://cdn.sqhk.co/vumivatuvi/jRifTji/idle_breakout_unblocked.pdfIn PDF document text
    • https://cdn.sqhk.co/lepitajirel/iAyUhgj/84491900249.pdfIn PDF document text
    • http://sajiwurejedetu.sportsontheweb.net/6316504367.pdfIn PDF document text
    • https://cdn.sqhk.co/gobuwovuv/ZigYUnd/7553739174.pdfIn PDF document text
    • http://zogasukod.22web.org/balakrishna_dialogues_videos.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a83bcf46-2417-4982-b284-a74c969b2454/veveniju.pdfIn PDF document text
    • http://nedomutologibum.epizy.com/kivuzesererulegat.pdfIn PDF document text
    • https://s3.amazonaws.com/nasitevu/jiganun.pdfIn PDF document text
    • https://s3.amazonaws.com/rimepusox/nova_stat_strip_glucometer_user_manual.pdfIn PDF document text
    • http://welojorolepone.rf.gd/ribinowira.pdfIn PDF document text
    • http://zodumuf.rf.gd/sectarianism_definition.pdfIn PDF document text
    • https://s3.amazonaws.com/wupiwupiwot/19039438612.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuduwonifa/street_fighter_hd_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/zabevog/how_to_be_draco_malfoys_girlfriend.pdfIn PDF document text
    • http://lenidifumejuvig.rf.gd/wapopo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a601d5ba-ff01-4dfb-a313-10b847a360b4/drinking_games_that_require_no_equipment.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010482.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10482 5380 bytes
SHA-256: 5356c9b4af517617339059474437850d23aa4d3c58bb350edb5b9b9749804181
font_01_sfnt_off000116e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116E7 10772 bytes
SHA-256: 7a55789aa49952a81dcaf228342e7652b24b9e3bd847d6fb6217dfa53dc005ac
font_02_sfnt_off00013ba1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BA1 16204 bytes
SHA-256: 31aa257675234f953cb39254c73a0c002637764ec2691c470e0912636c3685cf

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