Malicious PDF — malware analysis report

Static analysis result for SHA-256 a54dd0de6aaf316a…

MALICIOUS

PDF

71.8 KB Created: 2021-02-14 05:32:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: e0d659c95fa3106f3ecb343c07014f1e SHA-1: 0eb544fb75ca5ff0a06df66a572414db9c70641a SHA-256: a54dd0de6aaf316a1ba7428df41162e6adad342b8fb6f15576b4da7c239a344b
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links pointing to various domains, many of which appear to be disposable or used for SEO spam. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest it's designed to redirect users to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://leonvi.ru/123?utm_term=fireworks+animated+gif+download PDF link annotation
    • http://itanto.space/taking_anecdotal_notes_in_guided_readingpyclr.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374519/normal_5fe5defbcbac0.pdfIn PDF document text
    • https://rurasaza.weebly.com/uploads/1/3/4/8/134869927/5865162.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374374/normal_6025ab515121c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369907/normal_6009e14fbbd65.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478402/normal_600e619aaaa8a.pdfIn PDF document text
    • https://vozutadisifik.weebly.com/uploads/1/3/1/4/131483249/pemabifaram_roker_konimenagiriwes_sovox.pdfIn PDF document text
    • http://testvvd.xyz/wedding_song_playlist_templatetvr36.pdfIn PDF document text
    • http://websporizlehd.com/peterbilt_330_service_manualfek7x.pdfIn PDF document text
    • https://siputewebototab.weebly.com/uploads/1/3/4/4/134480832/xakafojow_ninafadowebefuk_goresexotu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489422/normal_5ff9785f14b58.pdfIn PDF document text
    • https://baxelawinojiw.weebly.com/uploads/1/3/4/3/134333718/nosijipi-gubugopifuj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368772/normal_5fdf00d69b339.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454550/normal_6020805fc5ef6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470679/normal_5ff549eb6d6b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496165/normal_600a999056ef9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483854/normal_5ffccf89b1f9c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419851/normal_6021f6db098ee.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
    • https://s3.amazonaws.com/nalifij/magekotej.pdfIn PDF document text
    • https://s3.amazonaws.com/tarajix/4688476252.pdfIn PDF document text
    • https://s3.amazonaws.com/jizubisetebof/girukuxagerejizut.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubatebedoxez/schindler_s_list_full_movie_free.pdfIn PDF document text
    • https://s3.amazonaws.com/mokamoba/rajigalitarised.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_off0000d036.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD036 5128 bytes
SHA-256: 2ea7596922321cd3f4ce33c8aec661e7e3b66de8b8f56ca788f0685c47f57346
font_01_sfnt_off0000e1a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1A4 9812 bytes
SHA-256: 60c5d9b53cbcf5748e6fdc99fb5223005b41a59f728b13d6e4f8cf4e68e5ef8e
font_02_sfnt_off00010339.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10339 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176