Malicious PDF — malware analysis report

Static analysis result for SHA-256 77dc8f93d42f5f1b…

MALICIOUS

PDF

81.9 KB Created: 2021-03-19 23:45:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: be85654f6b5cb7f5b9015852c8f85900 SHA-1: 54767df1c15dce602078f952f078e48e814d9b72 SHA-256: 77dc8f93d42f5f1b806e2f2ebba9271074da321ad369f92a91af9222a17d6a64
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with one prominent URL pointing to a domain associated with phishing and link farming. The document body, though heavily obfuscated, appears to be a lure related to a search query, suggesting a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://ponafet.ru/strik?utm_term=what+is+the+relationship+between+time+and+space PDF link annotation
    • http://fejukoturig.medianewsonline.com/54599647769.pdfIn PDF document text
    • https://cdn.sqhk.co/vesagivara/cpVfQJl/ritexemotatasapibonulen.pdfIn PDF document text
    • http://janusadow.mygamesonline.org/que_es_psicologia_social.pdfIn PDF document text
    • http://werikipirojenob.scienceontheweb.net/46155423442.pdfIn PDF document text
    • https://cdn.sqhk.co/xiwogoxozoxi/HjBjfhh/vapomifugelefolozokofo.pdfIn PDF document text
    • https://cdn.sqhk.co/tajudozizif/oibEijO/blade_launching_knife.pdfIn PDF document text
    • http://salea.site/safety_first_car_seat_compatible_graco_stroller4sakp.pdfIn PDF document text
    • http://opensol.xyz/hisense_air_con_remote_instructions9xoev.pdfIn PDF document text
    • http://bellissimo.online/mustang_owners_club_australia_nsw4qzbn.pdfIn PDF document text
    • http://zugemenelil.medianewsonline.com/rukedabusap.pdfIn PDF document text
    • https://cdn.sqhk.co/dudumadopole/jjhbhcu/78464947000.pdfIn PDF document text
    • http://jaxagogilexet.sportsontheweb.net/xusojexifev.pdfIn PDF document text
    • http://wubujonil.getenjoyment.net/wufusas.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/d1a7d218-a663-4cdc-b2f7-c43be68170f1/what_sugar_does_dunkin_donuts_use_in_iced_coffee.pdfIn PDF document text
    • https://s3.amazonaws.com/palevijuj/amiduos_pro_64_bits.pdfIn PDF document text
    • https://s3.amazonaws.com/vavapekadoliti/82826275873.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9024c8e-1718-4793-a34f-ea1d466d2368/64300087902.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9071aae7-ecae-4a4f-8b78-00dc0101ef9b/putesaber.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab72397f-8d48-4b3d-a45c-54159428d67c/can_a_sonic_boom_hurt_you.pdfIn PDF document text
    • http://sovogezo.atwebpages.com/17727405993.pdfIn PDF document text
    • https://s3.amazonaws.com/regovadeje/back_on_the_chain_gang_sheet_music.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f4be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4BE 5344 bytes
SHA-256: b2b0888190e2e27ce1f8ddc5e1b302d01fef023387e40760f56df7d23d315f3d
font_01_sfnt_off000106c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106C1 10852 bytes
SHA-256: 78655c0a2b07be3d2ac196fe8b509e0c4165b93876ef7945b81efb048fc01a64
font_02_sfnt_off00012bcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BCC 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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