Malicious PDF — malware analysis report

Static analysis result for SHA-256 8adf15f1d924cf4c…

MALICIOUS

PDF

78.7 KB Created: 2021-01-25 12:26:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 604a9689763e3a6ae372b29d2395958f SHA-1: c60a32b6dc65cecdb33f79728d2ffc180ad6fd09 SHA-256: 8adf15f1d924cf4c1d484063010336d533af58c947b006e1d0ee1bfe551d616c
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV, indicating malicious intent. It contains numerous external URIs, many hosted on disposable domains, suggesting a link farm or phishing operation. The presence of embedded URLs and the PDF's structure point towards an attempt to redirect users to malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafffe.ru/123?utm_term=a+manual+for+writers+turabian+8th+edition+pdf PDF link annotation
    • https://nunodovov.weebly.com/uploads/1/3/1/3/131380210/furoxel_garexawolazem_nepubijerisusup.pdfIn PDF document text
    • http://riforemepenog.iblogger.org/echinoderm_larvae_answers.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448343/normal_5fee77b3aed93.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384164/normal_5fcf311ce82b9.pdfIn PDF document text
    • http://kivumokaf.22web.org/ziwexufidas.pdfIn PDF document text
    • https://xebolefijepipol.weebly.com/uploads/1/3/0/7/130739937/121683.pdfIn PDF document text
    • https://muluxebaxomoj.weebly.com/uploads/1/3/5/4/135401331/riwewumokidivegu.pdfIn PDF document text
    • http://ru-dev.xyz/teacher_appreciation_week_2019_chipotleoa5os.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392442/normal_600cb64da4036.pdfIn PDF document text
    • http://lisolu.org/vj_top_recharge_online_reseller_programse7f8x.pdfIn PDF document text
    • http://vabuletarikinil.iblogger.org/85981671052.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449629/normal_5ff8316c239b8.pdfIn PDF document text
    • https://revowerixes.weebly.com/uploads/1/3/1/6/131607662/62897b011b9ed35.pdfIn PDF document text
    • https://kapukafasid.weebly.com/uploads/1/3/1/4/131437878/7174382.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://mekamaxabojumoz.epizy.com/mepoxutomunovoveliwenej.pdfIn PDF document text
    • http://nujexaraxeb.epizy.com/watch_anime_online_tv_apk.pdfIn PDF document text
    • http://tinejamuwaki.epizy.com/escape_room_answers_level_70_to_80.pdfIn PDF document text
    • https://s3.amazonaws.com/palikuvexake/herbivore_carnivore_omnivore_worksheet_5th_grade.pdfIn PDF document text
    • http://lepoxas.rf.gd/judojogabonun.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

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
font_00_sfnt_off0000e748.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE748 5576 bytes
SHA-256: ff00dd07c37409dda2b6c907fcd204cedfae819efd3e1a5ef60acba738f6f94f
font_01_sfnt_off0000fa13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA13 11344 bytes
SHA-256: 709e66b8ba1e73c002a224f3a3584a06dbe3b35ff666712220e85b3a4cdc6b3c
font_02_sfnt_off00011f49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F49 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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