Malicious PDF — malware analysis report

Static analysis result for SHA-256 763915b0aed81495…

MALICIOUS

PDF

93.4 KB Created: 2021-06-14 06:01:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: f74d8f97240d68fd2a58a23fb8740fb0 SHA-1: 910ecf70c9990c492c7b5bbcde3185370c4ce90a SHA-256: 763915b0aed814951d2cb88d7583572e9ab3ffdbca02854b9315963eff97f266
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9998

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 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://allytemp.ru/pbw?utm_term=calamity+mod+rogue+accessories PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tebejeloxid.pbworks.com/w/file/fetch/144754551/46600431064.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af57081f-9ead-4c9f-b0b9-6946bd56206b/how_to_prep_for_an_administrative_assistant_interview.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d92430d-aea2-40c2-8717-9c4dc3c277c6/23504191475.pdfIn PDF document text
    • http://gamanovu.pbworks.com/f/the_5th_wave_book_free_online.pdfIn PDF document text
    • http://suzojadek.pbworks.com/f/15358217920.pdfIn PDF document text
    • http://vokoperoj.pbworks.com/w/file/fetch/144979002/legend_for_electrical_plan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f9559f8-6638-4ab7-b81a-86d55bf8a764/skyrim_how_to_use_mods_xbox_one.pdfIn PDF document text
    • http://boxedaw.pbworks.com/w/file/fetch/145217220/26984504132.pdfIn PDF document text
    • http://jixerumuji.pbworks.com/w/file/fetch/145193550/the_last_of_us_2_collectibles_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4888110-e465-4cf7-9164-812b2a4cdd3e/pirates_of_the_caribbean_medley_piano_musescore.pdfIn PDF document text
    • http://liralafum.pbworks.com/f/95096361903.pdfIn PDF document text
    • http://doruneje.pbworks.com/f/yiruma_letter_piano_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d047225f-5442-41ce-92ef-16798451ae91/what_are_the_reasons_for_european_exploration_and_colonization.pdfIn PDF document text
    • http://doxawadar.pbworks.com/f/39222983962.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b79c0eb3-26da-4971-b1d6-d924252721a9/what_is_the_difference_between_systems_engineering_and_industrial_engineering.pdfIn PDF document text
    • http://lifelekufa.pbworks.com/w/file/fetch/144562881/6758921890.pdfIn PDF document text
    • http://medodadepud.pbworks.com/f/modle_atomique_de_bohr_exercice_corrig.pdfIn PDF document text
    • http://godekazonigi.pbworks.com/w/file/fetch/144749898/how_to_turn_on_igloo_mini_fridge.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25882c8b-eb5d-4bcf-826a-8ecbc0d68058/codigo_ascii_grados.pdfIn PDF document text
    • http://pakesobiroge.pbworks.com/f/68389887144.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_off00013207.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13207 5268 bytes
SHA-256: 16b55226ab6438e23e21dff9072f8bdb1158d3891242b64d7d87e0d7e940bbc3
font_01_sfnt_off000143df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143DF 10976 bytes
SHA-256: 47f157c4bd34b4940de777173df918fd838b2c3be6e322fba9eb1d20d036f9a4

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