Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f22981b14f4cad2…

MALICIOUS

PDF

92.4 KB Created: 2021-03-28 11:05:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 7f9baf56e2446cbfc381dd6c554c3ccd SHA-1: cb17e5ee76a84d99ddcdc761123e80a1070af911 SHA-256: 8f22981b14f4cad2a2fc6b22d5221fa5edf7943471ae1834d4a1c08d98065a2b
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9997

Heuristics 5

  • 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 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://seumenha.ru/123?utm_term=android+studio+update+some+conflicts PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4459929/normal_60279e25c726e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479441/normal_601d7d127c148.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383689/normal_60399af81f762.pdfIn PDF document text
    • http://urolog.xyz/776380066831t9ri.pdfIn PDF document text
    • http://sekijad.iblogger.org/69171345884.pdfIn PDF document text
    • http://shopsmmv.site/tadaxagotudog8hwn.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463812/normal_5fcc02a2f255b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452852/normal_603df08ab747e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373992/normal_6055fb43c5a05.pdfIn PDF document text
    • http://figojusu.iblogger.org/58677773789.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491173/normal_6003e662cc857.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://xijuroluzuka.epizy.com/splash_splash_love_episode_3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50d3e443-9e7c-4d76-b3a0-9f8dcd2a90b3/dmc-fz2000_vs_dmc-fz1000_ii.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/729c15ce-a7d3-4241-9d5b-bcb446c1a76a/20565147603.pdfIn PDF document text
    • http://ludodugadigepez.rf.gd/chrome_os_iso_usb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e20d7710-7927-4ed8-a527-0c114ee0db5d/gebofutolodusakure.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2525aa5d-be4f-421c-b9a2-939d7b7d8da2/metidiledulixomusivozeve.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011cc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CC0 5172 bytes
SHA-256: b23a84469b12414d7aa91d8c18486901f47c7687643bcefffddaf5a8f8ceabc4
font_01_sfnt_off00012e3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E3B 11720 bytes
SHA-256: 22ff8161fa332207ae1b626c6141d3c3e22e0950587cb84e7ce657a1fd6b2bd7
font_02_sfnt_off00015655.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15655 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

Open this report in the interactive analyzer, or submit your own file for analysis.