Malicious PDF — malware analysis report

Static analysis result for SHA-256 60e88a358f0a8957…

MALICIOUS

PDF

75.4 KB Created: 2021-06-01 01:58:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 0112f03a07244321a938086c3efde239 SHA-1: 6d7381baea712cc9b54169e92481268c5a0bf3f1 SHA-256: 60e88a358f0a8957599732667162f75945a3e4c82c9493368eaf7993b0c4d2eb
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 pointing to various disposable domains, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the structure itself is indicative of a malicious campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://pagomowe.weebly.com/uploads/1/3/4/6/134608852/musudagolu-sokuvanam-bidovoneg.pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4408172/normal_605bc45eaa8c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421460/normal_6059724b1d11d.pdfIn PDF document text
    • https://koburuwojut.weebly.com/uploads/1/3/1/3/131378968/bisuxawib.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369146/normal_605a28f773996.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4375197/normal_60b1ecc47ca45.pdfIn PDF document text
    • https://nizevamil.weebly.com/uploads/1/3/2/8/132814567/vowebuzuma-viviforik-masem.pdfIn PDF document text
    • https://marodesama.weebly.com/uploads/1/3/5/3/135349202/5680188.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365542/normal_5fcbae6aa46be.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460963/normal_6012167996276.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380536/normal_60337b02ee538.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377662/normal_606b34b7a0941.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410975/normal_6016368305c3e.pdfIn PDF document text
    • https://xakalawuvobovu.weebly.com/uploads/1/3/1/0/131071286/8946906.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414869/normal_5fd5f7f34afc4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368758/normal_601ee0ce9ce62.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469828/normal_604a912470bcc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424330/normal_5fe189235fd0d.pdfIn PDF document text
    • https://tekoxinir.weebly.com/uploads/1/3/4/6/134606092/04afbc0a2cea09e.pdfIn PDF document text
    • https://nagorulanol.weebly.com/uploads/1/3/4/4/134465391/zetelobufeselitop.pdfIn PDF document text
    • https://wozovogunetip.weebly.com/uploads/1/3/5/3/135396590/wiparituwisix-dumanilopabu-moxejatuw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://feedproxy.google.com/~r/wb/ENAH/~3/G1IkLG9TFNM/wb?keyword=boy%20scout%20councils%20in%20northern%20californiaPDF link annotation
    • http://xetibubib.pbworks.com/w/file/fetch/144418056/zotetuxomozabonim.pdfIn PDF document text
    • http://siwuromo.pbworks.com/w/file/fetch/144424617/78534742448.pdfIn PDF document text
    • http://jajafad.pbworks.com/w/file/fetch/144428415/96686586389.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_off0000e575.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE575 5120 bytes
SHA-256: 59b654645faa4d65c87093b3e5e321934627da6d4a556d811dd2232dc8cd67c9
font_01_sfnt_off0000f6eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6EB 11452 bytes
SHA-256: 7e331edf5bd286692597443306361f8ae029d560644375324b5490d879b0e068