Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5df995194c44185…

MALICIOUS

PDF

76.6 KB Created: 2021-03-17 00:16:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: f2cd138c20363e855031bd1c3638dfc9 SHA-1: dd1b8f11f2a0c143a257b6e9cd82f32f3613c290 SHA-256: b5df995194c4418506fa71b19462f46019d9ee3abfb06a02d8d761132e3317d9
126 Risk Score

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 0.9998

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://jottigo.ru/wix?keyword=playstation+remote+play+apk+2016 PDF link annotation
    • https://cdn.sqhk.co/gufulixofoma/ic3ijha/blank_v_neck_t_shirt_template_free.pdfIn PDF document text
    • https://cdn.sqhk.co/kavejufa/hjiagfM/16722534526.pdfIn PDF document text
    • https://dutegonuguval.weebly.com/uploads/1/3/4/3/134310875/7033953.pdfIn PDF document text
    • http://clyb-wylcan3.space/18072739973a4g8p.pdfIn PDF document text
    • https://cdn.sqhk.co/vowibesep/GTKjfjf/cartoon_pop_sound_effect_free_download.pdfIn PDF document text
    • http://jizefuli.22web.org/organic_flannel_sheets_canada.pdfIn PDF document text
    • https://cdn.sqhk.co/wuzutuse/jchcibE/84394387528.pdfIn PDF document text
    • https://cdn.sqhk.co/rufopunuk/cQlFjbR/doxukenazeredabudikis.pdfIn PDF document text
    • https://cdn.sqhk.co/fudamewojaf/ibusnjc/maze_runner_4k_wallpaper.pdfIn PDF document text
    • https://zetapowopes.weebly.com/uploads/1/3/0/8/130813904/bawunofagezexij-rorinino.pdfIn PDF document text
    • https://cdn.sqhk.co/jogepirar/himhaPo/nupetufemixij.pdfIn PDF document text
    • http://shtangelkipokupkiitd.online/escape_room_game_answers_level_48h9mpo.pdfIn PDF document text
    • http://lobulezinovux.medianewsonline.com/29109098839.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lakinosoxolebe.epizy.com/wupago.pdfIn PDF document text
    • http://vejozawuxurenij.rf.gd/the_hound_of_the_baskervilles_summary_chapter_13.pdfIn PDF document text
    • http://kesupipipiret.onlinewebshop.net/vuxop.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00010bca.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x10BCA 17204 bytes
SHA-256: a41871d0c01a9d273ef8e7d94d82dea40e7832d7a2c0b7db5bc2a73cc39a30fd
font_00_sfnt_off0000d29a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD29A 5612 bytes
SHA-256: 6cd2b19031fbe362a89ece77000f380228aa362d114d40d301bf7c2d953cb777
font_01_sfnt_off0000e5b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5B0 11624 bytes
SHA-256: 00236783119d5a10544c402b3a97978a45183a416f3fd262a4326917eb846ffd

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