Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b014c14d1a14642…

MALICIOUS

PDF

76.2 KB Created: 2021-02-26 14:15:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 8a07f03eda2a7e00d537ee2ff3a2fac7 SHA-1: 2854f6102e69ae31f74c4079de3f4e4dbded93ae SHA-256: 9b014c14d1a1464215e4937090dfe8301acc87b11c0df44e0b2d44ba623cfaa9
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, indicating a phishing or trojan payload. It contains numerous embedded URLs, with one prominent URL pointing to a site that appears to be a link farm designed to redirect users. The document body, though heavily obfuscated, contains text related to a common technical problem, suggesting a lure to trick users into clicking the malicious link.

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://leonvi.ru/strik?utm_term=why+my+dell+laptop+battery+is+not+charging PDF link annotation
    • http://tajumizigareni.iblogger.org/crosley_record_player_review_urban_outfitters.pdfIn PDF document text
    • http://zefoxerufizogo.22web.org/6244491631.pdfIn PDF document text
    • http://zeboxagekej.sportsontheweb.net/the_strength_training_anatomy_workout_ii_free_download.pdfIn PDF document text
    • http://wejowadizabudex.mypressonline.com/house_on_the_hill_lyrics_lil_skies.pdfIn PDF document text
    • https://cdn.sqhk.co/gumakulex/jhgdxaF/ludo_game_online_with_friends.pdfIn PDF document text
    • https://cdn.sqhk.co/zuxafopagad/gighzif/33105146046.pdfIn PDF document text
    • https://cdn.sqhk.co/tosijoxopum/4YScz4Z/22263603483.pdfIn PDF document text
    • https://cdn.sqhk.co/pofaxexaxi/ihQ9dMm/3234874964.pdfIn PDF document text
    • http://sugameloxufe.mywebcommunity.org/autocad_2d_furniture_blocks_library_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/koletexun/Ji0Bjgl/car_cards_model_railroad.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sokexodine.rf.gd/anticipatory_anxiety.pdfIn PDF document text
    • http://supuwevul.atwebpages.com/amana_microwave_light_bulb.pdfIn PDF document text
    • http://gegenig.epizy.com/metformin_weight_loss_antipsychotic_induced_weight_gain.pdfIn PDF document text
    • http://nixomirorubu.myartsonline.com/call_of_duty_modern_warfare_beta_dates.pdfIn PDF document text
    • http://zuvuzevo.atwebpages.com/xumoporunatomozisew.pdfIn PDF document text
    • http://golujaxi.epizy.com/83079174771.pdfIn PDF document text
    • http://risepaxazitomep.rf.gd/puzzle_fuzzle_answers_cottage.pdfIn PDF document text
    • http://livirava.atwebpages.com/69124661364.pdfIn PDF document text
    • http://jumepenitujox.atwebpages.com/philips_norelco_bodygroom_series_7000_canada.pdfIn PDF document text
    • http://gurabagoderes.atwebpages.com/pentair_triton_ii_tr60_laterals.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_off0000e93d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE93D 5744 bytes
SHA-256: 2dafe6ffc37d5758c9eba1e5de0670030495a5aa4aa7307d6349020e0df50c9a
font_01_sfnt_off0000fca8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCA8 11316 bytes
SHA-256: 246171e9016b81eaed9779da74bc30245498eee747064afb079db16f2b7aaa0a

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