Malicious PDF — malware analysis report

Static analysis result for SHA-256 267247f76b581ff7…

MALICIOUS

PDF

101.1 KB Created: 2021-03-09 07:25:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 67f9dacdcdcd9d229fd4aa16727341bb SHA-1: a43e0bc10ce52dffa80f9bee09ce6f74d3de3fa9 SHA-256: 267247f76b581ff7b45fa08d40beabd733a07912f1a25dc58a1c358a8c6149d3
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan. It contains numerous embedded URLs, many pointing to disposable domains and link farms, suggesting an attempt to redirect users to malicious content. The document body, though heavily obfuscated, appears to be a lure related to educational materials, likely to trick users into clicking the embedded links.

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
  • 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://ponafet.ru/award?keyword=adverbs+worksheet+grade+5+pdf PDF link annotation
    • http://mimasajikataza.iblogger.org/ordeal_by_cheque_by_wuther_crue_summary.pdfIn PDF document text
    • http://wobijovo.22web.org/82603543343.pdfIn PDF document text
    • https://pinuxijevafu.weebly.com/uploads/1/3/4/6/134608025/fc6a89065e8e.pdfIn PDF document text
    • http://liko-sneakers.com/practice_ged_test_questions6ldnk.pdfIn PDF document text
    • http://logvoz.ru/biochemistry_satyanarayana_freevars1.pdfIn PDF document text
    • http://vuvuga.xyz/network_topology_designlxsv0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497358/normal_5fdd3df45e10a.pdfIn PDF document text
    • http://netewe5.xyz/candle_light_full_video_song7y0kt.pdfIn PDF document text
    • http://testvvd.xyz/how_to_tell_if_photosynthesis_has_taken_place4axuz.pdfIn PDF document text
    • https://gavabukif.weebly.com/uploads/1/3/4/6/134614168/rikaxeduv.pdfIn PDF document text
    • http://memijijarem.22web.org/south_movie_3gpp.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370307/normal_6007f0d31ff05.pdfIn PDF document text
    • https://sitadubudotewor.weebly.com/uploads/1/3/5/3/135335426/jipowojifig_bamogijiz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c2c662fa-00ac-4c69-bf5d-04da7d6c99e2.filesusr.com/ugd/9b33c5_36b18b29e32948478eec38ce118896d6.pdf?index=trueIn PDF document text
    • https://246406bc-bb0d-4f29-baed-d8a6153a9543.filesusr.com/ugd/3ddeef_56ec42e96708424d974a5d81a44b58a9.pdf?index=trueIn PDF document text
    • http://duvexarido.epizy.com/bagolobijasu.pdfIn PDF document text
    • http://luloxefisamo.rf.gd/which_of_following_is_not_a_benefit_of_budgeting.pdfIn PDF document text
    • http://rirukezuruxemuk.epizy.com/various_synonym_formal.pdfIn PDF document text
    • http://bawatusarab.epizy.com/bafowofaralagama.pdfIn PDF document text
    • http://bajipelorisu.rf.gd/arborescence_informatique_service_rh.pdfIn PDF document text
    • http://xuboxigaxa.rf.gd/how_to_plant_lettuce_seeds_indoors.pdfIn PDF document text
    • http://jiroribi.epizy.com/52280857249.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_off0001478b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1478B 5740 bytes
SHA-256: a3cb790b750f45e5ac865fa68fe8bcf0f5008e81a241eadbfba42803b418f01f
font_01_sfnt_off00015b2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15B2E 13728 bytes
SHA-256: 96171fa34bbc5e10e7ed1096a79b4f06510f6aea534bed628b16c4fcba871f14

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