Malicious PDF — malware analysis report

Static analysis result for SHA-256 61176a2fad40e58a…

MALICIOUS

PDF

77.3 KB Created: 2021-06-01 05:40:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: a07bbdc085381925fb3c06595fc5c5ff SHA-1: 5b5e5d46913b974d54799456efbd100bcc627e9d SHA-256: 61176a2fad40e58acd230edaa49d9e25e17f98ac9dba524c436bfac3b4d2aae4
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 0.9994

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://catamma.ru/pbw?utm_term=bible+crossword+puzzles+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4386828/normal_605a9853d4884.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447101/normal_602e65958a827.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393883/normal_60367471555fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407997/normal_6047d1b9dc2b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367312/normal_60696268d7830.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496818/normal_5ff4901b7eff0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499300/normal_5fc9be3ed74b5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413575/normal_5ff109dc2e4db.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://bupataved.pbworks.com/w/file/fetch/144429117/installer_car_parking_4.5.0_apk_mod.pdfIn PDF document text
    • http://dawijunegolo.pbworks.com/w/file/fetch/144422334/quiz_planet_science_questions.pdfIn PDF document text
    • http://bupataved.pbworks.com/f/balam_pichkari_mp3_download.pdfIn PDF document text
    • http://godekazonigi.pbworks.com/f/how_to_disable_floppy_drive_in_bios.pdfIn PDF document text
    • http://nilanom.pbworks.com/w/file/fetch/144415239/murray_personality_theory.pdfIn PDF document text
    • http://dekokos.pbworks.com/f/witcher_books_the_last_wish.pdfIn PDF document text
    • http://mapijakemifo.pbworks.com/f/24322264176.pdfIn PDF document text
    • http://bovozajezo.pbworks.com/f/tapajuvewin.pdfIn PDF document text
    • http://sepaxebi.pbworks.com/f/fukifevilevigujunu.pdfIn PDF document text
    • http://nilanom.pbworks.com/w/file/fetch/144415713/how_to_use_the_i7s_tws.pdfIn PDF document text
    • http://wiwedano.pbworks.com/f/creepy_nights_at_freddys_1__android.pdfIn PDF document text
    • http://lugozamuxika.pbworks.com/f/how_to_get_25_000_robux_for_free.pdfIn PDF document text
    • http://xedidovetaw.pbworks.com/w/file/fetch/144417126/download_game_sword_art_online_infinity_moment_english_patch_2.0.pdfIn PDF document text
    • http://dibesusajob.pbworks.com/w/file/fetch/144440817/how_to_reset_iphone_5c_without_passcode_and_computer.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_off0000e2ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2FF 4964 bytes
SHA-256: e359a1460c8628eefb66ac04f5b00ebaa5386d2871886fc8b70f7f2a5c0a61f9
font_01_sfnt_off0000f3ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3FF 11196 bytes
SHA-256: 26e056db21a7a22a24a8fc593f02f242333d0208f6931dec903ebddc9bc55475
font_02_sfnt_off0001196b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1196B 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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