Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f7414bbc99ae7cc…

MALICIOUS

PDF

77.8 KB Created: 2021-05-27 04:02:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 94a0fe221eaa6d1a47209c2ee7292be4 SHA-1: eb22ade55001ff4dc108dbe43783acdb6742a512 SHA-256: 7f7414bbc99ae7cc4de5f4f429d06228a62dbdd611a6f3a1a78edbc6a4abccb6
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable hosting services, suggesting a link farm designed to redirect users. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The embedded URLs, such as 'https://gimoguvi.ru/strik?utm_term=canon+scanner+lide+25+driver+for+windows+10+32+bit', are used to lure victims under the pretext of downloading necessary drivers.

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://gimoguvi.ru/strik?utm_term=canon+scanner+lide+25+driver+for+windows+10+32+bit PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4417122/normal_602e38e05058f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414487/normal_605d430d79054.pdfIn PDF document text
    • https://tixamipoku.weebly.com/uploads/1/3/4/7/134740597/b006571daf2a91.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369638/normal_60586a587d8a9.pdfIn PDF document text
    • https://gozanesudobewer.weebly.com/uploads/1/3/4/8/134852120/loronazokemizit-xujodusikelez-dukanujel-vepubi.pdfIn PDF document text
    • https://gaxowaxogofesix.weebly.com/uploads/1/3/4/7/134719425/f5a5bf56.pdfIn PDF document text
    • https://kinijanara.weebly.com/uploads/1/3/4/5/134585029/zafavadimado.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387924/normal_606238ccd0cec.pdfIn PDF document text
    • https://ladunibik.weebly.com/uploads/1/3/4/0/134096621/6aa2900dab.pdfIn PDF document text
    • https://vudemigubujesi.weebly.com/uploads/1/3/5/3/135300151/laguvokomexad.pdfIn PDF document text
    • https://nanagimub.weebly.com/uploads/1/3/4/6/134632235/9276465.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480393/normal_60085cd2c6dbd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501206/normal_605fba124d057.pdfIn PDF document text
    • https://lulakoxefinadi.weebly.com/uploads/1/3/4/3/134332070/tigilusikorokonax.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387928/normal_5fe3bcf6d219e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454286/normal_602254719f506.pdfIn PDF document text
    • https://todukikezigegu.weebly.com/uploads/1/3/4/3/134359798/5f6fec.pdfIn PDF document text
    • https://bogilerilixami.weebly.com/uploads/1/3/5/3/135345361/dudapuwodijewi_wiwisor.pdfIn PDF document text
    • https://remejatezikame.weebly.com/uploads/1/3/1/0/131070309/tetabovaxula.pdfIn PDF document text
    • https://gexamefirizawem.weebly.com/uploads/1/3/4/6/134668325/d012f374ff61d47.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465269/normal_601366a4ac02e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/075b4791-7a75-488b-b6fa-0394a1fa06f1/kioti_lk3054_service_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db367522-7a1f-4399-a38f-a11918ce9fbd/what_size_file_do_i_need_for_my_husqvarna_chainsaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4af8113-96d1-4b61-82dc-db20d00a58a2/zopeliwisiz.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_off0000f00f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF00F 5828 bytes
SHA-256: ca5ff4f027b7cbdd9b974f0cc6e413d1d3841a4f42400b022e91672a3e5efe96
font_01_sfnt_off00010409.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10409 10832 bytes
SHA-256: 6f9a181c93e9581ca308f2d9a64be4a9e9e3b3691a0ef106546952df56304a97