Malicious PDF — malware analysis report

Static analysis result for SHA-256 af6ccf6be9a1f546…

MALICIOUS

PDF

73.8 KB Created: 2021-06-10 07:20:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: cba1faffcaa80ce09da93ad5408f866a SHA-1: cfaf6e0af2300cde3dad3e2e7c0483de6fbc3d35 SHA-256: af6ccf6be9a1f546040b2b65e65253cf5be16959643463abb490729ebd8648aa
126 Risk Score

Malware Insights

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

The PDF file contains multiple embedded URLs, with one prominently featuring 'family visa canada requirements' in its query string, suggesting a phishing or scam lure. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a large number of links pointing to disposable hosting, further supporting a malicious intent to redirect users. ClamAV detection and ML classification confirm the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://crewmak.ru/pbw?utm_term=family+visa+canada+requirements PDF link annotation
    • https://jefabogab.weebly.com/uploads/1/3/1/6/131636769/tozolujupeninir_tirip_xugemejamofij.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366957/normal_601e95dabe661.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385614/normal_6056a56dafec6.pdfIn PDF document text
    • https://gutototuwasikik.weebly.com/uploads/1/3/4/8/134876789/vefotowizuboke.pdfIn PDF document text
    • https://wirafoxojobukof.weebly.com/uploads/1/3/4/6/134608935/zutesozafewozal_diveniz_vopizatike.pdfIn PDF document text
    • https://tigasuzile.weebly.com/uploads/1/3/1/3/131379741/gedijefi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zuvuzut.pbworks.com/f/libotemuwibofopizamimuba.pdfIn PDF document text
    • http://ginosofep.pbworks.com/w/file/fetch/144887985/english_grammar_handwritten_notes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/865d6d88-5314-4618-8f9f-4e6febe02db7/kazerap.pdfIn PDF document text
    • http://veniwusuj.pbworks.com/w/file/fetch/144502911/ps_vita_emulator_android_download_mega.pdfIn PDF document text
    • http://nukisefel.pbworks.com/w/file/fetch/144994956/hunger_games_mockingjay_part_2_full_movie_download_dual_audio.pdfIn PDF document text
    • http://lakebimutep.pbworks.com/f/year_3_mental_addition_and_subtraction_worksheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/972c351e-92ef-4f32-91ec-405b4b30be03/5_love_languages_child_quiz.pdfIn PDF document text
    • http://palixazoke.pbworks.com/w/file/fetch/144556752/how_to_use_binomial_expansion_formula.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0acad8e6-c718-47f3-903e-34857e4eca3c/how_to_use_greenworks_1800_pressure_washer.pdfIn PDF document text
    • http://dejapitud.pbworks.com/f/vefudafomudupilujojenupe.pdfIn PDF document text
    • http://lakebimutep.pbworks.com/w/file/fetch/144418521/consider_the_lilies_of_the_field_piano_solo_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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e495.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE495 5328 bytes
SHA-256: cb437fa4342617942f5ce8ee5b3e68542d61a1ab2bb6755419e7c3d506c7e674
font_01_sfnt_off0000f6a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6A4 10316 bytes
SHA-256: f9564825f39465f0d9b792108e6db9cefaac846af9e1c8b43553bae4b5d0913a

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