Malicious PDF — malware analysis report

Static analysis result for SHA-256 c585469e563d2886…

MALICIOUS

PDF

83.9 KB Created: 2021-04-26 23:48:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 3b301283e889f3c6fc4a77b20d189fc8 SHA-1: 823a93fe22046cb5f1f57e9153c8defe4cd02ea2 SHA-256: c585469e563d2886b72a8c10efaa8f14684016e5137beb86d8c0456f23bb8304
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://fokemale.ru/strik?utm_term=fire+and+blood+release+date+tv+show PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4490244/normal_6035487400b92.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453889/normal_605b7be24b763.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416927/normal_60637521a4558.pdfIn PDF document text
    • https://kakejomoweva.weebly.com/uploads/1/3/4/6/134674311/a0a2896.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393761/normal_603dfa840c15d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376611/normal_60506a6ddfe8a.pdfIn PDF document text
    • https://ginuzakonufa.weebly.com/uploads/1/3/2/6/132681862/1ca18d94e53ea8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448986/normal_601964475ddad.pdfIn PDF document text
    • https://tajafakedebufu.weebly.com/uploads/1/3/1/4/131438499/000a6ac467379.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465704/normal_606c93fe5e458.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://891dfe3a-8969-4df2-b253-5ccc4ebbb7a0.filesusr.com/ugd/e66789_ee5dc0edb89946f1a85bf17ab2046c99.pdf?index=trueIn PDF document text
    • https://4b98dde3-f65d-4e11-807b-d4501949e87b.filesusr.com/ugd/4a7ebd_b0eb83fdee1b47d290f8acaf2943be95.pdf?index=trueIn PDF document text
    • http://risesodasa.epizy.com/82924088399.pdfIn PDF document text
    • https://d5fb4b5d-766d-4e54-ab1c-ecc61d2b7d82.filesusr.com/ugd/b0c8dc_d0e068071295478f882f84e4fbe62f73.pdf?index=trueIn PDF document text
    • https://71a5d838-4e22-4830-8da1-7955ec3365f5.filesusr.com/ugd/f2f43e_9b739a05027a4f5eb1cc220f40e1f643.pdf?index=trueIn PDF document text
    • http://sewadereweben.epizy.com/givufuvirizazo.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

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_off00010825.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10825 5160 bytes
SHA-256: f0d739158c00d274db5c3a150ac85fc6d0049377f8125a462d75222bc7c01611
font_01_sfnt_off000119bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119BC 11492 bytes
SHA-256: 29b5ddfc6341d9fb57bc50de1a9d146db0f0ddae53c1ed651c15dd791f5348e9

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