Malicious PDF — malware analysis report

Static analysis result for SHA-256 7507f1f74df703bb…

MALICIOUS

PDF

77.9 KB Created: 2021-03-20 03:04:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: e6a18d709bc6f47cd680a1b872d80789 SHA-1: da3e9a04136294e72aa0083eddd0ecee1fb0441b SHA-256: 7507f1f74df703bb0a8f79b2f9d9236a4f7168228fae9e421191bc2f50b8d938
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is a PDF that contains a lure for a game guide, which is a common phishing tactic. It redirects to a suspicious URL, indicating a phishing attempt to trick users into downloading malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or trojan distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/wix?keyword=total+war+warhammer+1+factions+guide PDF link annotation
    • https://cdn.sqhk.co/rozesivotix/er1KDOa/jazz_music_radio_station_seattle.pdfIn PDF document text
    • https://cdn.sqhk.co/puwupasakej/9jeheja/wamozonusekoromilisazuw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457298/normal_5ffffc0420ace.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497093/normal_604a63f1e5908.pdfIn PDF document text
    • https://cdn.sqhk.co/lijedubejop/bichaig/87315616609.pdfIn PDF document text
    • http://cupe1.ru/dexudijitoxa0bmvu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469351/normal_5fe9067901215.pdfIn PDF document text
    • https://cdn.sqhk.co/mowasikuso/t7j1dii/dajogim.pdfIn PDF document text
    • http://all-host.site/how_to_write_an_introduction_about_yourself_for_a_new_jobkhx3f.pdfIn PDF document text
    • https://cdn.sqhk.co/naziwixolagu/7chfhg1/boo_2020_svg.pdfIn PDF document text
    • http://littlenat.space/bissell_little_green_portable_spot_and_stain_cleaner_1400m_instructionsl82e7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c37eb8f-799e-4923-b118-4afe3dfa7ad2/cuentos_de_eva_luna_dos_palabras.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d7cb0fb-4ea1-422f-822e-e83e59f186bf/16797979115.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e41d2b1-6395-4d48-a83f-3478574460d3/craftsman_88173_not_starting.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d405b37-3e43-4e8d-a7c5-e18d7db70a42/lg_front_load_washer_drain_pump_removal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7eaeb063-691f-4ea7-859b-255a09c36582/77086867996.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0eae284c-089c-49f6-99e5-857dac45672f/lujusafejiwafigosibure.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02463b49-72ae-4cac-9995-0608e0c0430f/toro_timecutter_z4200_front_tire_size.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6e0af6e-1ec5-4e3b-a540-7f434dd956f1/85542254309.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5444ca06-c020-426a-9384-e59f930d7a37/bob_evans_ground_sausage_nutrition_facts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c35bdfa-3b93-45b6-aed5-c044b3cccf32/how_to_crochet_a_granny_square_beginners_tutorial.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_off0000f166.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF166 5528 bytes
SHA-256: 2b44b430e889f519200a8eb075aca3ce69146610fac31c7395dc3e64345be19b
font_01_sfnt_off0001041e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1041E 11112 bytes
SHA-256: 868040ed133248161c1b2622dc782f3955786221854e6773737d82e808b35d98

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