Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce01a472d8d44d97…

MALICIOUS

PDF

72.1 KB Created: 2021-06-09 00:16:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 08e8103341c77fdd8394b6f79bc72f54 SHA-1: 0566620a96cbefbb4ada8a0da5f60bd20d032459 SHA-256: ce01a472d8d44d97db55f6f54fefee54651f8c1d8e99fe68d51773141790b21e
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a link farm with numerous external links, many hosted on disposable domains, suggesting a phishing or malicious redirection attempt. The primary URL, 'https://crysiq.ru/pbw?utm_term=mujrim+1989+full+movie+free+download+mp4', is presented as a search result for a movie download, a common lure. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://crysiq.ru/pbw?utm_term=mujrim+1989+full+movie+free+download+mp4 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4445114/normal_6046371fdf1e6.pdfIn PDF document text
    • https://kawepuwaseleza.weebly.com/uploads/1/3/4/8/134849925/2908b89c75f.pdfIn PDF document text
    • https://rulodewarozuw.weebly.com/uploads/1/3/4/6/134678260/6e59a684dc527b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372960/normal_6010f453b3a81.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482415/normal_6044969820a5f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404528/normal_60346854cd86d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410027/normal_5fe21a0aa05b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381978/normal_5fe6c98daf18a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472773/normal_5fc96eac2f030.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376369/normal_5fef3c7813809.pdfIn PDF document text
    • https://vajasefa.weebly.com/uploads/1/3/4/4/134490273/xagijogomu-jemisizudepik-vusesetune-kediditamumigu.pdfIn PDF document text
    • https://xozugovapotup.weebly.com/uploads/1/3/1/1/131164024/nokonop-wotixog-jodamujigifom-wagilot.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377391/normal_606d4fc59ad93.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vifogajo.pbworks.com/f/muneban.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d7d6dd4-1cc0-4eaa-aa51-dac594ba888d/where_gives_you_free_stuff_on_your_birthday_uk.pdfIn PDF document text
    • http://komogabovuwa.pbworks.com/w/file/fetch/144808989/rangers_apprentice_book_10_weebly.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3880dfc7-22a6-47b5-929c-17f3f44691bc/11405059794.pdfIn PDF document text
    • http://gudotoxej.pbworks.com/f/do_huntress_wizard_and_finn_get_together.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_off0000dab3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAB3 5732 bytes
SHA-256: a17c5135a71562099444194c9607dcdcf2a7e7f819e1293853597f49ee003bb6
font_01_sfnt_off0000ee4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE4C 11132 bytes
SHA-256: 845a8c010047221b754eeec6a81085cf9066cd317bb748d73fd4e6189f8b25e1

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