Malicious PDF — malware analysis report

Static analysis result for SHA-256 73dee1391e32a83d…

MALICIOUS

PDF

122.0 KB Created: 2021-05-03 21:14:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 46affe47f158ae7ceabfee58a1d3a5c8 SHA-1: eb1da9c6be701a5976394cb556298f900fc72478 SHA-256: 73dee1391e32a83d4c71d81dd48564c8505179351374401df589cdc32d8c1c5e
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable domains and are associated with link farm heuristics. One prominent URL, 'https://golowaki.ru/strik?utm_term=do+katniss+and+peeta+die+in+catching+fire', is directly linked to the document's apparent content, suggesting a lure. ClamAV detection and ML classification strongly indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://golowaki.ru/strik?utm_term=do+katniss+and+peeta+die+in+catching+fire PDF link annotation
    • http://purpless.vip/interrogative_adjectives_worksheet_answers4yhgs.pdfIn PDF document text
    • http://votatiji.22web.org/fipeki.pdfIn PDF document text
    • http://forsage.pw/data_analytics_using_python_book0tl2s.pdfIn PDF document text
    • http://9gusevshop.space/free_halloween_flyer_templates_photoshopoyd4s.pdfIn PDF document text
    • http://jovekigapovokeb.22web.org/historia_idioma_espaol.pdfIn PDF document text
    • http://free-at.pro/85892218686evvbp.pdfIn PDF document text
    • http://carbags.site/xifepevikowoxiwutqeskd.pdfIn PDF document text
    • http://arendagg.xyz/american_eagle_history_of_companywpj0f.pdfIn PDF document text
    • http://cherrypimp.online/robin_hood_live_action_disney_cast7sxa3.pdfIn PDF document text
    • http://1eyvgo.xyz/francis_ching_architectural_graphicsnknii.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f648f13b-3650-4bb2-b9c2-031dc28c87ca/troy_bilt_weed_eater_carburetor_adjustment.pdfIn PDF document text
    • http://fevoroxigur.rf.gd/49376601450.pdfIn PDF document text
    • http://kojavigetizafi.epizy.com/african_short_stories_chinua_achebe.pdfIn PDF document text
    • https://s3.amazonaws.com/sakaburepagase/adultery_paulo_coelho_epub_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62b68218-7b18-4725-8d08-92fbe030708a/4113297752.pdfIn PDF document text
    • https://s3.amazonaws.com/wufujudisu/amazon_prime_video_android_tv_mibox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ca05332-4ec8-4fbb-8e79-2f3c495b88a9/fotaxekixe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c85cfd04-d1e4-48a8-a94f-cf4d78b34ab0/catia_training_material.pdfIn PDF document text
    • https://s3.amazonaws.com/guxosa/34885436114.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/686c1bdf-57cb-42aa-8b48-c07b71d86026/hal_leonards_music_theory_for_guitarists_by_tom_kolb_download.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_off00019e12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19E12 5448 bytes
SHA-256: 57df3a46a14b149ac53fa31fd85349dac57848c4352541c9ef7810a3a59fe306
font_01_sfnt_off0001b0a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B0A6 11752 bytes
SHA-256: 48d7f1495d9464591ccafe923fb0152e2104f01c3a5c24dd452f33be8f6c5265

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