Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e844a6d5317977c…

MALICIOUS

PDF

73.2 KB Created: 2020-12-28 04:32:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: fe026ec0a7e42e2a6ed314683d1f4ba8 SHA-1: e85ad834381b65c52b4118274ce8c96019364a09 SHA-256: 3e844a6d5317977c179d5d3fc727654c1e66cd7aed38a1cde555471035ba5150
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing campaign. The heuristic 'PDF_SEO_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM' indicate a deliberate attempt to create a network of redirecting URLs. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for distributing further malware or conducting phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 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://traffnew.ru/strik?utm_term=kendall+and+kylie+sweater+dress PDF link annotation
    • https://lezafopiga.weebly.com/uploads/1/3/4/6/134628758/89202b9277b9bc.pdfIn PDF document text
    • https://vafumigoku.weebly.com/uploads/1/3/1/3/131384305/gopabi-xixiko-donodije.pdfIn PDF document text
    • https://bawenijujobafo.weebly.com/uploads/1/3/4/6/134670929/ruluvopis.pdfIn PDF document text
    • https://bekijarodik.weebly.com/uploads/1/3/4/6/134617997/negasezufit.pdfIn PDF document text
    • https://zubajabazu.weebly.com/uploads/1/3/4/4/134466761/bebiribava-wogekipa.pdfIn PDF document text
    • https://gitokivoj.weebly.com/uploads/1/3/4/3/134316846/sudimomelu-xevez-jituvalavutixux-bafolaxuvovez.pdfIn PDF document text
    • https://kazajiti.weebly.com/uploads/1/3/4/4/134456981/gukemol_jikonuzefenud_bupul.pdfIn PDF document text
    • https://tabikanopik.weebly.com/uploads/1/3/4/7/134705808/lejejapekawe.pdfIn PDF document text
    • https://wepugimi.weebly.com/uploads/1/3/1/0/131070973/592bb2139.pdfIn PDF document text
    • https://muzufuwuvul.weebly.com/uploads/1/3/2/3/132302955/fogetonotusi-piwajosilekix-pavagepitit-tejiv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403563/normal_5fd727a481a8c.pdfIn PDF document text
    • https://jeponiruwapin.weebly.com/uploads/1/3/0/7/130776483/6390004.pdfIn PDF document text
    • https://bubosetew.weebly.com/uploads/1/3/4/5/134515161/jagifomegivunox.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pibabopuduj/68005968230.pdfIn PDF document text
    • https://s3.amazonaws.com/vinivuxo/scanned_to_word_free.pdfIn PDF document text
    • https://s3.amazonaws.com/buponuwebi/tefasefilutuxojujom.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_off0000e143.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE143 5048 bytes
SHA-256: aec2bfafd62ce0c1a9d2475c36ff9de26b68ecdd2eb6abdc10c42987a4058880
font_01_sfnt_off0000f295.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF295 11112 bytes
SHA-256: 326ed361be229fc1c0b902c7ab2f693dbadc43fa9010a99caf059eca56743300

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