Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d047719c64029ec…

MALICIOUS

PDF

100.9 KB Created: 2021-03-11 20:41:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 642c98f03a5ef3ce9348cdbe5abe2aa5 SHA-1: fea0d45e55fc66c8b779c139ce93021be385c1f2 SHA-256: 7d047719c64029ec0126ff6fe992ca89e7d1fb43072da25e8f228e2f2e8332cc
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 pointing to disposable domains, suggesting a link farm or phishing lure. The document body, though heavily obfuscated, contains keywords like 'electro-optical guided missiles' and references to airline/visa information, likely intended to deceive users into clicking the malicious links.

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://gimoguvi.ru/123?utm_term=electro-+optical+guided+missiles PDF link annotation
    • http://foteraza.22web.org/mobaxodigobuxe.pdfIn PDF document text
    • http://italy-small.space/cherry_keyboard_switches_typesi8fip.pdfIn PDF document text
    • http://beststudent.fun/free_fire_samurai_wallpaper_hd_downloadqr7p9.pdfIn PDF document text
    • http://rorezorejadij.iblogger.org/doomsday_heist_hack_guide.pdfIn PDF document text
    • http://optamorem.com/81734529722pogzk.pdfIn PDF document text
    • http://visemomasa.66ghz.com/pokemon_diamond_pokeradar_chaining_guide.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/dowesitobuga/emirates_airlines_visa_and_passport_information.pdfIn PDF document text
    • http://jojisoxig.epizy.com/zolivuwisegoduziwidur.pdfIn PDF document text
    • https://8860adff-7f0b-4cf3-a358-cdd560dff136.filesusr.com/ugd/625844_ced204f3db364efdb675bc3528af084e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/86069e18-a371-4a1d-b6d7-bd4f48c0740b/hopper_with_sling_amazon_prime.pdfIn PDF document text
    • https://s3.amazonaws.com/jitimesolagun/nujasil.pdfIn PDF document text
    • https://ea74ff18-003d-4094-8454-8d7e15e33abb.filesusr.com/ugd/50de67_5d374f0a38e54a9c8c3a712371ee65f5.pdf?index=trueIn PDF document text
    • http://gisatazab.rf.gd/block_email_yahoo_mail_android.pdfIn PDF document text
    • http://gajopem.epizy.com/wawusowave.pdfIn PDF document text
    • http://merojupamen.epizy.com/58927736026.pdfIn PDF document text
    • https://307a23dc-bb60-4906-9a68-69e45957aa19.filesusr.com/ugd/d2057d_6ad9ce9f4fd548119e6fcf9100887ef4.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef3930e7-f94e-4f0b-923f-dbc3bc4e85bf/business_vocabulary_in_use_advanced_book_with_answers.pdfIn PDF document text
    • https://b962d5b8-8819-42e3-9ba3-d95e8366760e.filesusr.com/ugd/f51585_7e073a3865344277afb19c2ee2e9b346.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/66bee561-3234-4d21-81c8-e56b989898b8/the_unbearable_lightness_of_being_movie_online_greek_subs.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_off00014048.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14048 5160 bytes
SHA-256: 90773473887fc3c42d35e8e6aa8cb10bcc9e71afd3575cf4286a8de604c82568
font_01_sfnt_off000151d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x151D7 11316 bytes
SHA-256: fd5aa06be63f1f69eabdc83783936db3e47c8fa2d56d63ae0ce3916d2414ef49
font_02_sfnt_off0001784e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1784E 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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