Malicious PDF — malware analysis report

Static analysis result for SHA-256 64819d1b04bd1899…

MALICIOUS

PDF

107.0 KB Created: 2021-05-25 16:13:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 16ad5711011450bbb89c709b90164171 SHA-1: 46184146d0ae370e663c19f008b32992a68b1c00 SHA-256: 64819d1b04bd1899fdeec5368706894428e27203cb2ba9e1b14f5eb7dff767c0
156 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 embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://jumiwimov.ru/strik?utm_term=what+is+a+holding+pattern PDF link annotation
    • https://ridejotewofo.weebly.com/uploads/1/3/5/3/135314456/49296.pdfIn PDF document text
    • https://tilifezazam.weebly.com/uploads/1/3/4/7/134763305/zetawevibujaleti.pdfIn PDF document text
    • https://siraxaroxaran.weebly.com/uploads/1/3/1/4/131483069/bbc5d5.pdfIn PDF document text
    • https://jutawalafomas.weebly.com/uploads/1/3/4/3/134316275/nobigirureronaxit.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://uploads.strikinglycdn.com/files/9a8e9a9f-136a-4b13-bfc0-6745e4e6bd69/kenmore_70_series_washer_rinse_cycle_not_working.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d2e3dc2-ba5b-44cc-8269-9454819898e2/arctic_king_room_air_conditioner_reviews.pdfIn PDF document text
    • https://s3.amazonaws.com/jewizopukuni/kenmore_elite_front_load_dryer_thermal_fuse_location.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9640a9b0-e326-4e4f-a4fd-6c6f599fecfa/hopper_3_installation_diagram.pdfIn PDF document text
    • https://s3.amazonaws.com/zagubip/3d_tuning_android_hack_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/tutapaxi/90942286545.pdfIn PDF document text
    • https://s3.amazonaws.com/punagilelabon/adobe_media_encoder_cc_2014.pdfIn PDF document text
    • https://s3.amazonaws.com/desekusoxi/21522992771.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95038074-7eff-4769-a0f9-a1d54d3e530c/how_to_find_out_how_many_day_trades_on_webull.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/583fba9d-44b1-43db-8a53-efe0107f8771/ap_style_guide_courtesy_titles.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/863d78f4-14b8-4694-8d5e-165c9ace18a6/94257249529.pdfIn PDF document text
    • https://s3.amazonaws.com/bulolimepol/12420571287.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb383ab5-0add-4e89-b4c5-f3b9656ec920/origami_book_for_kids.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3460eb6-7aec-4a2c-8a49-a56947278277/aircraft_maintenance_engineer_wages_canada.pdfIn PDF document text
    • https://s3.amazonaws.com/genijusemu/browser_for_vu_android_tv.pdfIn PDF document text
    • https://s3.amazonaws.com/lekizopiloref/jiwiwetukuxisozululaxu.pdfIn PDF document text
    • https://s3.amazonaws.com/kiwopusafize/47396202202.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014b0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B0E 2912 bytes
SHA-256: 1baa3efd180cf5f44d613abe34ea0380c2d25dd221f4ef864ac418d56f73cc35
font_01_sfnt_off0001556a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1556A 5024 bytes
SHA-256: b672135a208320f7861677585dbf79f595cd380830e5d95bb367ac8ce1122435
font_02_sfnt_off00016674.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16674 12232 bytes
SHA-256: 8373e80a3baf75847fae896792bcdf016b26161ba9e705745e80092f266d4940
font_03_sfnt_off00018ff2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18FF2 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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