Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5266d04000c83eb…

MALICIOUS

PDF

74.3 KB Created: 2021-02-17 23:19:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 4ed3ebfbca976eb1358f8df7cf71e804 SHA-1: 0ba8b7a6478b415813f8734e1129c3c87bbdd247 SHA-256: d5266d04000c83eb61dc7cb6890c2e786a1eb5a644e124b9026703ba3713488e
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and ClamAV. It contains a large number of external links, many pointing to disposable hosting services, suggesting a link farm or phishing operation. While no scripts were explicitly extracted, the PDF structure and embedded URI heuristics indicate it's designed to redirect users to potentially malicious or scam-related websites.

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://crophysi.ru/wix?keyword=omega+ruins+guide PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4379618/normal_6021a31de8d27.pdfIn PDF document text
    • http://wefinexof.iblogger.org/beginners_running_guide_for_half_marathon.pdfIn PDF document text
    • https://zevebijupaxize.weebly.com/uploads/1/3/4/7/134754497/jiroga.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381105/normal_5fc630fd031c9.pdfIn PDF document text
    • https://zajefogana.weebly.com/uploads/1/3/1/4/131407312/fovidenalofuga.pdfIn PDF document text
    • https://faniruwesil.weebly.com/uploads/1/3/5/9/135993686/tibojerarosid.pdfIn PDF document text
    • https://ritesevegozuvij.weebly.com/uploads/1/3/1/6/131606822/vorotuve_diwavabewe.pdfIn PDF document text
    • https://ziperivowupidu.weebly.com/uploads/1/3/1/3/131381589/natoravavuxufazu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388048/normal_6012d4a05e8fb.pdfIn PDF document text
    • https://pobapuzelikawe.weebly.com/uploads/1/3/0/7/130739661/siteratarugizegozo.pdfIn PDF document text
    • https://vigagexagadip.weebly.com/uploads/1/3/1/8/131856194/luvejetige.pdfIn PDF document text
    • https://vademakab.weebly.com/uploads/1/3/1/3/131380849/9d656abad684b1c.pdfIn PDF document text
    • https://direwuberegenis.weebly.com/uploads/1/3/4/3/134361890/wanunofiz.pdfIn PDF document text
    • https://xevulesej.weebly.com/uploads/1/3/0/8/130874496/vewuduwu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bosulug.epizy.com/adobe_flash_player_android_pie.pdfIn PDF document text
    • http://lepeporiluvoxaj.epizy.com/forma_cautelar_definicion.pdfIn PDF document text
    • http://rusuxagek.rf.gd/free_cacti_0._8_network_monitoring.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_off0000e7ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7EE 5140 bytes
SHA-256: 924ab76d800ccf77d6cf14b150e9a42b5a380fed33f44ac7213d0f02d66bc934
font_01_sfnt_off0000f94e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF94E 10240 bytes
SHA-256: b33543d6ff0922596e732c700b50441333a339c26ae0f1fe00e285b43287e95d

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