Malicious PDF — malware analysis report

Static analysis result for SHA-256 c292dfc8f37fedb4…

MALICIOUS

PDF

76.6 KB Created: 2021-03-06 03:46:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 2c9aa148c311298a9404085c1f5ba4bb SHA-1: 56369412a131081f85a3d28ed849fdfd40d475bb SHA-256: c292dfc8f37fedb449c2c582e53008dfa849ec9aa54c5aae8b87870ee168eb5c
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, many hosted on disposable domains, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure related to a technical query, directing users to the malicious domain fokemale.ru.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://fokemale.ru/strik?utm_term=why+does+my+rca+projector+keep+turning+off PDF link annotation
    • http://comp-arenda.site/siwamelozabsnu.pdfIn PDF document text
    • http://bilkan.fun/sekojamefepevotatenefzkqw.pdfIn PDF document text
    • http://draiwenstore.online/ozark_trail_rechargeable_flashlight4exst.pdfIn PDF document text
    • http://smartroom.pro/are_led_flares_coast_guard_approved0wqgt.pdfIn PDF document text
    • http://cethq.xyz/63460816129wi9p2.pdfIn PDF document text
    • http://goodnatural.space/wufilopibibezanopakeye735.pdfIn PDF document text
    • http://reduslimitalia-ufficiale.site/cake_recipes_from_scratch_red_velvetdbeyv.pdfIn PDF document text
    • http://1fps.ru/65723123975ycvt9.pdfIn PDF document text
    • http://medtechnika1.ru/authorization_for_direct_deposit_form_quickbooksrhm1n.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/3a49fb1c-fa96-49b9-ab11-8a4112afe2aa/tuvajotiv.pdfIn PDF document text
    • http://kesowodo.epizy.com/dd_spellbook_cards_deck_martial_powers_and_races.pdfIn PDF document text
    • http://minofadejewezup.rf.gd/logemuxotojuzasejemebixak.pdfIn PDF document text
    • https://s3.amazonaws.com/lixisariwulo/39365863846.pdfIn PDF document text
    • http://tisilakifejil.rf.gd/adda_247_all_books.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a66b8c3f-b575-4b8c-9536-772a180cedbe/megiwatumatupubuwofasen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5e6e8fe-e368-4577-8b02-80d7c19d48b0/igloo_mini_fridge_with_freezer_white.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/152614c5-e47d-46d0-b01a-7eddad858b33/find_the_second-order_partial_derivatives_of_the_function.pdfIn PDF document text
    • http://kapixij.epizy.com/51437009011.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec7b528d-520f-4020-81aa-7c6d7cffd543/harry_potter_book_1_audiobook_length.pdfIn PDF document text
    • https://s3.amazonaws.com/dugibabafod/free_voicemail_app_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/daraniwekamidir/40649682002.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/177678ff-95d1-4081-ac53-812c27c46636/70665089921.pdfIn PDF document text
    • https://s3.amazonaws.com/jupudizadid/human_physiology_book.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_off0000ed6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED6B 5792 bytes
SHA-256: 8106d8f5f205444111b1272c6941c5d361d4d8cbd1bf894ebcc6a379dcb78aa8
font_01_sfnt_off0001011c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1011C 10588 bytes
SHA-256: d921bc77b6db09285e778c05009804ac6786447ee634475a0cf62ac387291da3

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