Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3c31f190f6aa2ad…

MALICIOUS

PDF

75.6 KB Created: 2021-03-05 03:06:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: b86ae2e2d9591e58f9c49330047b9d5c SHA-1: 5d5e90f4378d5dd4feff2f7c6207791737893281 SHA-256: c3c31f190f6aa2ad0cf6c2cec4af9977041d8f09afc7fa25b819b486c7bb0165
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document body and embedded URLs suggest a lure for free movie downloads, a common tactic for phishing or malware distribution. The presence of external URIs and link farm heuristics further supports this, pointing towards a malicious PDF designed to redirect users to potentially harmful websites.

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://jottigo.ru/wix?keyword=monsters+university+full+movie+free+download+in+hindi+480p PDF link annotation
    • http://siditomema.22web.org/mekuduraradagitevo.pdfIn PDF document text
    • http://dezlice.ru/running_princess_2_game_play_onlineytja5.pdfIn PDF document text
    • http://useplafond.xyz/pharmacology_books_for_nursing_studentsnvu2s.pdfIn PDF document text
    • http://kyrgyztours.com/road_warriors_hawk_and_animal_picturesd0ej0.pdfIn PDF document text
    • http://gapilojazixo.getenjoyment.net/zovatefasosam.pdfIn PDF document text
    • http://dapajurop.mygamesonline.org/8355002646.pdfIn PDF document text
    • http://5coupon.info/nijotivinejatonulkkpu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sakogabutal.onlinewebshop.net/8219602914.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a40ca0e-81a2-4a0f-ae45-02543259044e/does_charlie_gordon_die_in_flowers_for_algernon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa3e0d03-d498-4370-9c3b-4961b32f1a09/asus_maximus_vii_hero_usb_3.0_drivers.pdfIn PDF document text
    • http://roporuti.onlinewebshop.net/whitfield_pellet_stove_service_near_me.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2480ea9f-5c04-48c4-b4be-adcde2e05808/sumovijidajifakenobut.pdfIn PDF document text
    • http://zesafemumibow.myartsonline.com/39345323566.pdfIn PDF document text
    • http://xotaferuju.myartsonline.com/57618269429.pdfIn PDF document text
    • http://xinifaduzinuvu.onlinewebshop.net/muvidaponit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb05e3ce-4894-456f-b08d-04183eb5a8b6/84870531405.pdfIn PDF document text
    • http://pesewaluzitapu.epizy.com/buvalikatelu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b221b2fd-0b90-455a-953a-234f3bb63a89/rujenasebodibogexivuge.pdfIn PDF document text
    • http://jozubukobuwaju.epizy.com/challenge_bhojpuri_movie_video_song_mp4.pdfIn PDF document text
    • http://fejusadifidexi.epizy.com/bozafixivetopisobatesisip.pdfIn PDF document text
    • http://rodiwube.epizy.com/lagu_another_you_brian_mcknight.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_off0000e940.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE940 5964 bytes
SHA-256: 3a50ced467c2386e5c971f9d98a79f707db8141b8bba3ae184a0855188073c05
font_01_sfnt_off0000fd8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD8C 10332 bytes
SHA-256: 226f8ed1f29e069e2d08fd2392d1853389c4a42d6229fe42899df845a3621c5e

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