Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4687432e1d751c4…

MALICIOUS

PDF

69.0 KB Created: 2021-03-18 01:07:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: d61d2d7d2fba2e68d7c37a589b915941 SHA-1: 1262e4a121707a7b98065d657de7c193942c0ca2 SHA-256: d4687432e1d751c49a0fad83c46ece6d1685857be4a2d985ab737bd97a36b7d6
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://yafferge.ru/award?keyword=amoeba+sisters+video+recap+osmosis+answers+pdf In PDF document text
    • http://fajasated.mywebcommunity.org/fizupolukuman.pdfIn PDF document text
    • https://cdn.sqhk.co/linidivez/QVsjgzI/96544247640.pdfIn PDF document text
    • https://cdn.sqhk.co/gerukoso/fj4XjeL/spring_toe_nail_designs_2020.pdfIn PDF document text
    • http://kovatafob.mypressonline.com/garmin_nuvi_2639lmt.pdfIn PDF document text
    • https://cdn.sqhk.co/gifexajed/Jhhbigq/latest_virus_kill_for_android_1.pdfIn PDF document text
    • http://fibaxoxadomi.sportsontheweb.net/37689303392.pdfIn PDF document text
    • https://cdn.sqhk.co/kubepugemaki/hgiQGQ7/defender_90_price_usa.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/ditiruz/cladogram_practice_worksheet_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/zidosozawok/how_much_is_j_prince_net_worth.pdfIn PDF document text
    • https://s3.amazonaws.com/lebejos/5602787871.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc3c43d4-a437-45ba-b494-9cb6b207acb2/hp_laserjet_1320_driver_for_windows_10_64_bit_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/viwoxuz/20841036148.pdfIn PDF document text
    • https://s3.amazonaws.com/telasebisu/jiboxiku.pdfIn PDF document text
    • https://s3.amazonaws.com/buganabowumujef/womesobose.pdfIn PDF document text
    • https://s3.amazonaws.com/dogazisuze/mt_n_makgeolli_brightening_mask_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/mokixetat/asrock_z170_pro4s_lga_1151.pdfIn PDF document text
    • https://s3.amazonaws.com/sinamozagemoger/rcog_guideline_for_pph.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2fbdfa12-0c39-43b0-8c36-846ffd32a971/how_to_repair_fridge_not_cooling.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bdb5aaa6-3271-497c-a899-d875bd0138a5/rofukoguzilugorazoki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c7459c1-deff-44f1-af4f-4c2f10bd334f/zofakawilezovegovuranex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45c09352-ccec-4134-9100-6b245765bdad/81265184447.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_off0000d01c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD01C 5548 bytes
SHA-256: 9a2c2cd1cfdded8a94f5ba4d8703c89ab919aac11291cd3fc2d92c1ef5dbe5ab
font_01_sfnt_off0000e2f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2F8 10420 bytes
SHA-256: 53fc658f28bea3c2ed0fb043d642a4355bfe2b41ea70b89a08c6e804beb04e26

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