Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcabff760a2f1260…

MALICIOUS

PDF

73.5 KB Created: 2021-03-26 03:53:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: e93328037b9bc132bd49b9168a54ac73 SHA-1: c879f38267052b22e3957b0a5d9d0bf6ec218815 SHA-256: fcabff760a2f1260fd1b1629b59b7eb677304c2a9845ecf39b3368987be89fd8
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external URIs, with one specifically referencing a popular movie title and hosted on a domain flagged as suspicious. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URI usage suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://jacksth.ru/123?utm_term=chappie+movie++in+tamilrockers PDF link annotation
    • https://cdn.sqhk.co/jaselavujuwi/9AU8qNX/3062973115.pdfIn PDF document text
    • https://cdn.sqhk.co/jowapezo/cgehhuy/tubemate_video_er_for_iphone_5s.pdfIn PDF document text
    • http://nokilupijavep.22web.org/1626739365.pdfIn PDF document text
    • https://cdn.sqhk.co/xedomobedusi/eihjhhe/police_car_racing_simulator_traffic_shooting_game.pdfIn PDF document text
    • http://alkostore.xyz/lubelofivibefutokepezexq7eoo.pdfIn PDF document text
    • http://canlisohbetim.net/designer_city_2_building_game_mod_apk9d3lc.pdfIn PDF document text
    • http://sushibara.net/86215188578zek73.pdfIn PDF document text
    • http://homearfes.com/citizen_promaster_navihawk_eco-drive_movement_black_dial_mens_watch5q4ge.pdfIn PDF document text
    • http://www-sfr-fr-monespace.com/shark_world_tap_pocket_mod_apk_unlimited_moneycqzte.pdfIn PDF document text
    • https://cdn.sqhk.co/rovukupovumo/HD5ggjj/94444804605.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/rabewiruzitewa/the_lightning_thief_chapter_18.pdfIn PDF document text
    • https://8909b315-4d59-4940-aabf-0fdaa532e0ad.filesusr.com/ugd/4542d9_4896c94b742841f3931da0558e823a61.pdf?index=trueIn PDF document text
    • http://pobunutad.epizy.com/domain_driven_design_eric_evans.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f30e15e-bfc1-4a87-a94a-85be2ef361cb/35664832063.pdfIn PDF document text
    • https://s3.amazonaws.com/vuterijoze/dell_t5500_non-optimal_memory_population_detected.pdfIn PDF document text
    • https://8c77b9b7-c39b-43d6-9406-6086bd2c0f93.filesusr.com/ugd/ee6770_dbf0eea4ef4d4334bfd1414b0be057c5.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3bc5ea4-e3ee-4999-9650-7d57cd553854/bertrand_russell_quotes_fools_and_fanatics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/439f3bd0-a40d-4585-a0d8-3b1f405f25d2/how_to_replace_ge_profile_microwave_door_switch.pdfIn PDF document text
    • https://s3.amazonaws.com/wetevali/zinenat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40ec56fa-4d27-44d9-9b3c-20851cdff4cb/49981824517.pdfIn PDF document text
    • http://tidovagupuwosep.rf.gd/pixemonaxatotimejejodezet.pdfIn PDF document text
    • https://s3.amazonaws.com/jotizifime/98556528925.pdfIn PDF document text
    • http://rafetomobu.rf.gd/proper_assisted_pull_up_form.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_off0000e007.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE007 5200 bytes
SHA-256: 6d0756722dfcb0889661ffe26dd573c3d0f1d3a0d5812be61330077a8d2a1983
font_01_sfnt_off0000f18d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF18D 11808 bytes
SHA-256: a24815dc273841cb361cb8d125d1f3f9aa4ccd7afc5757947ec8a1ba7a02be6d

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