Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8e34544679bb331…

MALICIOUS

PDF

103.2 KB Created: 2021-02-28 18:40:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 8105cd194cd7397381e829e8b212bc74 SHA-1: 2f4aa7d986bf79fb50e7b562e8a75800602513e5 SHA-256: d8e34544679bb331598f36648a085c304cba47ae2cfbaaf4eec7cab5b16e3421
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, with one prominent URL pointing to a suspicious domain, likely serving as a lure. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document's structure is designed to host many links, reinforcing the phishing or malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://maypoin.ru/123?utm_term=tc+renegade+54+cal+barrel PDF link annotation
    • http://loleveze.iblogger.org/38385115828.pdfIn PDF document text
    • http://makamar.tech/doubt_a_parable_fullqp42v.pdfIn PDF document text
    • https://cdn.sqhk.co/javufikari/RQiCCOx/siren_head_vs_cartoon_cat_rap_battle_reaction.pdfIn PDF document text
    • https://cdn.sqhk.co/desavusomo/s7EC1gc/redcon1_mre_bar_blueberry_cobbler.pdfIn PDF document text
    • http://figuxovutofid.mygamesonline.org/can_you_vent_a_portable_air_conditioner_through_a_window_screen.pdfIn PDF document text
    • https://cdn.sqhk.co/sotatixorawi/fhijFga/dream_symbolism_ocean_water.pdfIn PDF document text
    • https://cdn.sqhk.co/vesagivara/hga2Wge/airplane_mode_movie_netflix_rating.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408340/normal_5fd81f621a1eb.pdfIn PDF document text
    • http://premiumpornclips.com/78788516957ic6ta.pdfIn PDF document text
    • http://cardioactiveufficiale.site/61002751106av91m.pdfIn PDF document text
    • https://cdn.sqhk.co/digusamixi/ijij0gc/juicy_fruit_strain_info.pdfIn PDF document text
    • http://tryraisins.pro/fakekogotuwomitimus76ml.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/niwotipugonuvoz/besox.pdfIn PDF document text
    • https://s3.amazonaws.com/davubewu/pride_celebrity_scooter_wiring_diagram.pdfIn PDF document text
    • https://s3.amazonaws.com/zifilobesumafi/11372188508.pdfIn PDF document text
    • https://s3.amazonaws.com/fejatepudopito/30853699289.pdfIn PDF document text
    • http://jatuxijor.epizy.com/why_is_my_tumble_dryer_drum_not_turning.pdfIn PDF document text
    • http://xuvufajozurez.rf.gd/11262909288.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014985.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14985 4780 bytes
SHA-256: 34c8631acdaa247150c5c165c4525ca77ed2c149e857ef7f12c53c92422ecea5
font_01_sfnt_off000159c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x159C6 11708 bytes
SHA-256: 642b242f60a7d90d46705a2464b62db97f02e0f1b0131d4f6423ef1bdf88c6c0
font_02_sfnt_off0001818c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1818C 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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