Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb1d10b35acad22e…

MALICIOUS

PDF

77.9 KB Created: 2021-06-10 11:00:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: aa953e2ecdedc5a5ea3ca833984566c7 SHA-1: b78be1940c8eaa3b0fff6f08d08958aeacf80400 SHA-256: cb1d10b35acad22ec87d6840b377cd6b939e5a7412ba195d703e11757f065203
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains a link farm with numerous URLs, including one pointing to 'pixomot.ru', which is likely an attempt to trick users into downloading potentially unwanted software. The document body, though heavily obfuscated, contains text related to 'Vidmate apk download', reinforcing the lure. No scripts were extracted, but the presence of external links and the link farm heuristic suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://pixomot.ru/pbw?utm_term=vidmate+apk+download+install+old+version+2019+free+download PDF link annotation
    • https://wujipomazoki.weebly.com/uploads/1/3/1/3/131384492/lomuloluzexamuzux.pdfIn PDF document text
    • https://xijivokabororix.weebly.com/uploads/1/3/4/8/134879859/dejis_kuribeg.pdfIn PDF document text
    • https://povarudoro.weebly.com/uploads/1/3/5/3/135324530/9eca5646554.pdfIn PDF document text
    • https://fazapezipomen.weebly.com/uploads/1/3/1/4/131453522/8833641.pdfIn PDF document text
    • https://rujizubag.weebly.com/uploads/1/3/0/7/130776042/wumilibovurudexunexu.pdfIn PDF document text
    • https://didegesub.weebly.com/uploads/1/3/2/6/132681352/548956.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lugozamuxika.pbworks.com/f/how_to_get_25_000_robux_for_free.pdfIn PDF document text
    • http://werinenimuta.pbworks.com/f/stay_focused-app_block_premium_apk.pdfIn PDF document text
    • http://zepadatoju.pbworks.com/f/what_book_is_grave_cleric_in.pdfIn PDF document text
    • http://patimedudemu.pbworks.com/w/file/fetch/144700089/33787292134.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56b0abad-8285-44be-90f4-bef99d2a78e2/14409602831.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e21eb16e-4a26-4578-9e8c-70f8afac232d/xologavijigewibav.pdfIn PDF document text
    • http://jejogitu.pbworks.com/f/metamorphosis_1_sheet_music__50____Medium__50.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cbc0f0e2-9b5f-4d16-8b63-d99d4422710f/mars_and_venus_on_a_date_free_download.pdfIn PDF document text
    • http://mibegenav.pbworks.com/w/file/fetch/144439038/40226417347.pdfIn PDF document text
    • http://legesir.pbworks.com/f/daffodils_poem_questions_answers.pdfIn PDF document text
    • http://kuperuxowix.pbworks.com/f/76752950463.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a49b7d08-b658-4d2e-953e-5e88df14b020/32823915698.pdfIn PDF document text
    • http://xiwitanul.pbworks.com/w/file/fetch/144563913/garudur.pdfIn PDF document text
    • http://juwelite.pbworks.com/w/file/fetch/144873351/construction_company_profile_design_template_word_free_download.pdfIn PDF document text
    • http://kufavuva.pbworks.com/f/65667861824.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_off0000f0c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0C3 5848 bytes
SHA-256: 09765d01fd9b4f615acac4fb4f4415697cf401163c91471b7cbe2536e7d679e6
font_01_sfnt_off000104b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104B1 10744 bytes
SHA-256: 41e31122d9c06e94cd805435e8ba6e48487fc4cf0d7369ef9d805be77580a4f0