Malicious PDF — malware analysis report

Static analysis result for SHA-256 54dd697b0aa4e2b3…

MALICIOUS

PDF

73.3 KB Created: 2021-01-18 16:05:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: d556682b93d55be8e5d2561984262338 SHA-1: 75a57095184b2ac68468d053d0ef62052b3031e4 SHA-256: 54dd697b0aa4e2b3fc05dcc629b438a4c50eaac04e147af07f35edbb478aa2d0
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to disposable hosting services and are associated with link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The document body, though heavily obfuscated, suggests a lure related to game mod downloads.

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://trafficel.ru/123?utm_term=gta+san+andreas+mod+apk PDF link annotation
    • https://cdn.sqhk.co/romumoxoleno/jDjbjd1/8930349654.pdfIn PDF document text
    • https://site-1172631.mozfiles.com/files/1172631/fake_snapchat_support_email.pdfIn PDF document text
    • https://site-1174368.mozfiles.com/files/1174368/jakafik.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422658/normal_5ffad49c3cd32.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459805/normal_60025ceedf2b1.pdfIn PDF document text
    • https://site-1171990.mozfiles.com/files/1171990/vumifalasediviz.pdfIn PDF document text
    • https://cdn.sqhk.co/mogizilo/hcGQLWn/smash_hit_2d.pdfIn PDF document text
    • https://site-1172568.mozfiles.com/files/1172568/mimpi_teman_hamil_artinya_apa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408583/normal_5fadb2d4390de.pdfIn PDF document text
    • https://cdn.sqhk.co/letonolomo/1LY1mjc/podoxagijoj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418746/normal_5fa389987103f.pdfIn PDF document text
    • https://site-1202168.mozfiles.com/files/1202168/34205889333.pdfIn PDF document text
    • http://penibibujobufux.iblogger.org/55864148505.pdfIn PDF document text
    • https://site-1171687.mozfiles.com/files/1171687/basezaridurusanuwe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lumixi/demisazaziwopela.pdfIn PDF document text
    • http://kuviwobabevi.epizy.com/16709832793.pdfIn PDF document text
    • http://gogozibopuxut.epizy.com/win_10_1909_update.pdfIn PDF document text
    • http://wekapalipewux.epizy.com/lutudiba.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_off0000e155.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE155 5168 bytes
SHA-256: d6c8ac86b9cd5fa48c97151d77372753f7b1e27a7a3cfd13b119e6e364cf676b
font_01_sfnt_off0000f2d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2D5 10420 bytes
SHA-256: 94a2b41170ff2f940068ba5ff815d690a2dc56d393ba61a6e293538aa2155fe8

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