Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3c805d291bfc249…

MALICIOUS

PDF

78.2 KB Created: 2021-03-06 06:23:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 01c540ef6d4cfa096eadfde94bdcd164 SHA-1: 20715303411cc0a3c0e332b13670a71191a6adb0 SHA-256: e3c805d291bfc2494fcd2e9cdd1e2b7353f53bd40f8c2d39801fdc246f5a25cb
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, indicating a phishing or trojan threat. It contains numerous embedded URLs, with one prominent URL pointing to a domain associated with award-related keywords, suggesting a lure for users seeking specific information. The presence of many links on disposable hosting further supports a link farm or phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://maypoin.ru/award?keyword=boy+scout+store+massapequa+new+york PDF link annotation
    • http://3bureaureport.info/gunamamevirevopiniwunoxuvkwtc0.pdfIn PDF document text
    • http://xexajume.iblogger.org/assignment_cover_sheet_sample.pdfIn PDF document text
    • http://xexogafuko.22web.org/letafijademapozopirojen.pdfIn PDF document text
    • http://rakapugijumub.sportsontheweb.net/jude_the_obscure_film_youtube.pdfIn PDF document text
    • http://digerutejonoju.22web.org/woxuzugorejul.pdfIn PDF document text
    • http://gufutaca6.xyz/58685259136cjsx8.pdfIn PDF document text
    • http://mupulopi.22web.org/how_to_learn_visual_basic_for_excel.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tesetibixofi.epizy.com/zotitabarep.pdfIn PDF document text
    • https://s3.amazonaws.com/sedowedi/675108489.pdfIn PDF document text
    • http://pusapovewazigu.onlinewebshop.net/what_is_the_difference_between_viral_and_bacterial_tonsillitis.pdfIn PDF document text
    • https://s3.amazonaws.com/baxunaf/cord_cutters_guide_2018.pdfIn PDF document text
    • http://kopunojode.rf.gd/electrical_circuit_theory_book_for_diploma.pdfIn PDF document text
    • http://gozenabuzixi.onlinewebshop.net/37522998757.pdfIn PDF document text
    • http://xedovafimolodem.epizy.com/anjaam_full_movie_film.pdfIn PDF document text
    • https://02bc4616-4eae-4b38-b2c9-0e654f754ee0.filesusr.com/ugd/069df5_458b2f493b3f48e6879dd7e39653f4a2.pdf?index=trueIn PDF document text
    • http://kateporabub.epizy.com/offline_accounting_software_free_full_version.pdfIn PDF document text
    • https://8ca15cf9-c5bf-4329-906a-32df3c7b5ab7.filesusr.com/ugd/4ca7f5_85810484656f42af877937fed321ea5d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sepovutapakogaf/cabelas_42_meat_grinder_reviews.pdfIn PDF document text
    • https://s3.amazonaws.com/ropuba/cambridge_primary_english_stage_1.pdfIn PDF document text
    • http://pedirite.onlinewebshop.net/wd_my_cloud_mirror_4tb_specs.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_off0000e8af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8AF 5480 bytes
SHA-256: 33179a5a65b4167a50a7a6b1401b0b620a1b0b341a93c87732e369ef615f4d87
font_01_sfnt_off0000fb65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB65 14908 bytes
SHA-256: e2beb0112ae5c5f2f5d1b9f286f8cd4549c4d70c32c558e73bb0d1d7c8c24a22

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