Malicious PDF — malware analysis report

Static analysis result for SHA-256 038318e364e7776b…

MALICIOUS

PDF

72.6 KB Created: 2021-05-11 02:57:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: d40bc86104c55a0b49e8d571bf2df9d3 SHA-1: 910cb91119c3bc29ba1f4a2e5dd413d8c4808122 SHA-256: 038318e364e7776b4608902521735e9d6a5561474af9ae5b98c0c099648ceebd
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable domains and employing UTM parameters, indicative of a link farm or phishing campaign. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and embedded URIs point towards an attempt to redirect users to malicious or deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9919

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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://midufefew.ru/strik?utm_term=are+tarot+cards+easy+to+learn PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4489595/normal_6034d1397b315.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480589/normal_601875e3ae6fb.pdfIn PDF document text
    • http://tiktokcopyrighthelpteam.com/6522642545642wzs.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470211/normal_5ff40774baac6.pdfIn PDF document text
    • http://kefisofelipado.22web.org/doxozunovurakat.pdfIn PDF document text
    • https://gunobome.weebly.com/uploads/1/3/1/3/131398345/rerurazuse-tupijuvupiruve-mukub-vugejutagerisak.pdfIn PDF document text
    • http://mazers.fun/92516868823xlape.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418566/normal_5fd652f4d37a4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425492/normal_5fd3772ec9acf.pdfIn PDF document text
    • https://bokesaxigalul.weebly.com/uploads/1/3/0/7/130776824/seger.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370560/normal_5fe936a69289a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413231/normal_605893d8ed63d.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/6a742af3-190a-4ba6-82fa-d78c195618ea/59592270875.pdfIn PDF document text
    • http://zuzenif.rf.gd/present_perfect_simple_exercises_intermediate.pdfIn PDF document text
    • http://magovinirubow.epizy.com/lukoz.pdfIn PDF document text
    • http://jidoreno.epizy.com/desago.pdfIn PDF document text
    • http://seropurubok.epizy.com/how_long_does_serta_icomfort_mattress_last.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d610f6ff-cb32-4129-b99b-b922c8f8de27/wevetipodizirinu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3cc5191a-d878-4c4b-9825-3f4061bbc110/38619459666.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b06fe891-8a72-4535-891d-680ba5faa781/miberujabejusuru.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA85 5024 bytes
SHA-256: f82e0b230351400316458facdca1170686a340b04bcc3956efb61e86a7e81594
font_01_sfnt_off0000fbab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBAB 10848 bytes
SHA-256: 7f34986de0707a4ee22c3345c1253a8ae3d2fa7601314268d5b27fa6a7b358d6

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