Malicious PDF — malware analysis report

Static analysis result for SHA-256 2dfcf8614c8622bd…

MALICIOUS

PDF

89.9 KB Created: 2021-05-07 07:55:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 75031044a051a87a3d99db3f00d953e0 SHA-1: 19d0f651dbde8074ba514c1132106a18d4028c9c SHA-256: 2dfcf8614c8622bdb876ac92021bc549ffb5248f8897ae9b640e68925c1e4d7c
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://crophysi.ru/strik?utm_term=still+alice+trailer+deutsch PDF link annotation
    • http://toxinudi.22web.org/como_hacer_un_archivo_a_word_gratis.pdfIn PDF document text
    • https://cdn.sqhk.co/wesebewoweva/hh5jijb/pabefem.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422640/normal_5ffa7ef1b432a.pdfIn PDF document text
    • https://cdn.sqhk.co/nogorodizet/ghjiifN/tap_tap_fish_abyssrium_mod.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413240/normal_5fdc18e408cd3.pdfIn PDF document text
    • https://cdn.sqhk.co/jikubivev/hhjjmgj/anatomy_of_maxillary_central_incisor.pdfIn PDF document text
    • https://cdn.sqhk.co/fiporalisu/hhhjjja/does_he_like_me_back_gay.pdfIn PDF document text
    • http://patutejugivipi.iblogger.org/edersheim_bible_history.pdfIn PDF document text
    • http://ritikutoxukor.22web.org/56241435075.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471236/normal_602a50b1c3f8e.pdfIn PDF document text
    • https://cdn.sqhk.co/sirepajaku/IEOgdjf/autocad_3d_bend_pipe.pdfIn PDF document text
    • http://vufilulojusabid.iblogger.org/79895250627.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tosotagerazopor.epizy.com/68135507043.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df63d442-13c4-4909-ae91-09eb681623e8/tezugapebepuva.pdfIn PDF document text
    • http://vizulubafaxal.epizy.com/danuvunudotabirezoki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/095ce3eb-b0ef-49c3-99e2-0c8c28933549/61982598784.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5fdf451-c3d4-4511-95a5-5a83e8946a4e/how_to_fill_floor_jack_with_fluid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/528f4c24-0655-4a0e-b8cf-d655a7c24fbb/debupuzo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97088993-a966-439d-8328-f8b0743a6444/dark_heresy_2_enemies_within.pdfIn PDF document text
    • http://wiwazez.epizy.com/aggregate_planning_problems.pdfIn PDF document text
    • http://pigadanafoton.rf.gd/89803078445.pdfIn PDF document text
    • http://mujelolix.epizy.com/avery_22806_template.pdfIn PDF document text
    • http://jagazuzigi.epizy.com/sony_ps_vita_memory_card_16gb.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_off00011d6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D6C 5128 bytes
SHA-256: 31374c887d40aae70b123d590b3131c52db869ef7ad282f61eb4589ca42a4374
font_01_sfnt_off00012ecb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12ECB 13380 bytes
SHA-256: b1ff4e97cdc7864dc8b0ba863c8aeab230a349e3d9673f0289e1fce1070758bc

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