Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2d8e3a75449a1f0…

MALICIOUS

PDF

75.5 KB Created: 2021-01-31 02:41:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 6dc941e6efba07c52a738782c1bf7ebd SHA-1: b860fa1fa0cbd76ede027e904050a3aa13f9d13b SHA-256: d2d8e3a75449a1f03520c24badffb7ee4dcc8502f1cf76a5b3ec919d3fc0c8f8
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which are hosted on disposable domains and flagged as link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were extracted, the presence of external URIs and the overall structure point towards a malicious document designed to redirect users to potentially harmful content.

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://seumenha.ru/123?utm_term=act+1+scene+2+macbeth+questions+and+answers PDF link annotation
    • http://auto-fishing-rods1.club/518742141475y16q.pdfIn PDF document text
    • http://monongzhlh.space/juwotonuvamuhjk10.pdfIn PDF document text
    • https://cdn.sqhk.co/mugolino/a7jdMIF/roads_of_rome_new_generation_iii.pdfIn PDF document text
    • https://cdn.sqhk.co/jirowolad/icZncjh/mr_bojangles_lyrics_and_chords.pdfIn PDF document text
    • http://tisigetid.iblogger.org/wsus_server_2016_not_yet_reported.pdfIn PDF document text
    • http://help-igcopyright.xyz/best_ever_chocolate_cake_recipes_ukqvp5j.pdfIn PDF document text
    • http://noxodexuvalolum.iblogger.org/minecraft_pc_free_offline.pdfIn PDF document text
    • https://cdn.sqhk.co/vibisimak/tj2Pjc1/dominoes_games_online.pdfIn PDF document text
    • http://domifonupesif.iblogger.org/ninupuferim.pdfIn PDF document text
    • https://cdn.sqhk.co/liwewajawab/haX8jce/98144649097.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/zevutebulaworel/totoxeriwozilumazovarag.pdfIn PDF document text
    • https://s3.amazonaws.com/bawalidamovidud/12428943478.pdfIn PDF document text
    • http://turegipamikum.epizy.com/non_deductible_ira_contribution_irs_form.pdfIn PDF document text
    • http://risawanidav.epizy.com/navra_bayko_marathi_movie.pdfIn PDF document text
    • http://zugujegezamuto.epizy.com/premikudu_audio_songs_ing_telugu_lo.pdfIn PDF document text
    • http://jajapelemazibog.rf.gd/bahubali_3_trailer_full_hd.pdfIn PDF document text
    • http://lisotabisalak.epizy.com/bahubali_film_song_in_tamil.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_off0000ea67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA67 5680 bytes
SHA-256: 1afc94295cabddf2428e6353ca8538fde30c36a4abac7bfb0c3f2e5013143f80
font_01_sfnt_off0000fd9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD9B 10212 bytes
SHA-256: 2e3c11db0dd6812251f1907568f60fd52ffdf4547d4e0ccb666865cade030662

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