Malicious PDF — malware analysis report

Static analysis result for SHA-256 42190620fd2e74f1…

MALICIOUS

PDF

78.7 KB Created: 2021-03-27 17:59:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 696b5ce20e85698428fe2783ae310723 SHA-1: 2917a718057de6a7854523707039d36c5bb49cf3 SHA-256: 42190620fd2e74f17304e2e118077bf2dfe0a1e34b2de0772aa9a8e0eb179f03
224 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains embedded links to known malicious redirector infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The SE_MFA_LURE heuristic suggests the document is designed to trick users into providing sensitive information, likely through a phishing pretext. The ML classifier and ClamAV detection further support its malicious nature. The document's primary function appears to be directing users to malicious sites for credential harvesting or further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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.
  • 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://crophysi.ru/strik?utm_term=directv+genie+2+installation+manual In PDF document text
    • https://cdn.sqhk.co/sebutarukaw/hh87pX9/10182907814.pdfIn PDF document text
    • https://cdn.sqhk.co/nijusukelok/khfTgeh/wodalererijotozifeza.pdfIn PDF document text
    • https://cdn.sqhk.co/pawiwodogu/Mhaijw2/79281499498.pdfIn PDF document text
    • http://raifaisentapp.online/happy_mothers_day_coloring_sheets_printabled78u5.pdfIn PDF document text
    • http://tatajosak.22web.org/luzakikojotuvilel.pdfIn PDF document text
    • http://stebsmeh.space/crystal_bible_freev30ir.pdfIn PDF document text
    • https://cdn.sqhk.co/wuxidubez/dijixji/decode_duo_codenames_duet_online_locally.pdfIn PDF document text
    • http://beststudent.space/vividowixeruroxaserulaxuksajc6.pdfIn PDF document text
    • http://ca-management.website/throne_of_glass_overviewo89nz.pdfIn PDF document text
    • http://vandify.com/making_inferences_character_traits_worksheetgus2f.pdfIn PDF document text
    • http://gifagudilul.mypressonline.com/autobiography_of_a_coin_in_2020_words.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
    • http://zitasixan.atwebpages.com/ridgid_miter_saw_stand_review.pdfIn PDF document text
    • http://tufopabapud.rf.gd/92862549806.pdfIn PDF document text
    • http://jetetejev.rf.gd/board_game_design_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/975f63d6-9166-4229-872a-e070b13284a9/what_were_the_original_rides_at_disneyland_in_1955.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56a8dc9d-d1c4-4c21-87fb-69c4eee632c1/download_adobe_premiere_elements_15_full_crack.pdfIn PDF document text
    • http://deravamosu.rf.gd/81471795988.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/138d8292-fd5f-4073-a295-a84f3aed4d89/85995916868.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a0b265d-d9fb-4c64-8dde-e187cf32058c/best_vegan_side_dishes_for_thanksgiving.pdfIn PDF document text
    • http://senixanuxulas.rf.gd/myanmar_books_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/345d94b1-032a-4a64-bbe6-8fd2c36f8af1/24850137212.pdfIn PDF document text
    • http://pijopatamotawu.epizy.com/yamaha_av_receiver_rx-a720_manual.pdfIn PDF document text
    • http://buzumigasox.myartsonline.com/dexenokugotebexek.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_off0000e968.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE968 5192 bytes
SHA-256: f8f4f826507922e024cab8a86a10eedc9edcaa3f8327d94127db6350ad4733ed
font_01_sfnt_off0000fb07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB07 10564 bytes
SHA-256: 3a5ccb71e1c0cf25a544059a097cd232571bfa004cbbd46cde0c051c19986933
font_02_sfnt_off00011f3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F3A 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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