Malicious PDF — malware analysis report

Static analysis result for SHA-256 19bb84d453129ade…

MALICIOUS

PDF

85.4 KB Created: 2021-04-05 09:07:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: ef6bbc3acb68c7833a15a3d2836145da SHA-1: de6c476b14fceb1611afc3c414b04d83cbc92413 SHA-256: 19bb84d453129ade9aee033633503f96571f5894f396017b1ebc966d7a7cafe2
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://vilenefex.ru/strik?utm_term=20+meter+delta+loop+antenna+plans PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4492275/normal_601aaeed1bb8a.pdfIn PDF document text
    • http://betijeduw.getenjoyment.net/44779509231.pdfIn PDF document text
    • https://rogejizerabori.weebly.com/uploads/1/3/4/7/134763318/wogoso.pdfIn PDF document text
    • http://goodnatural.space/gre_vocabulary_app_free_downloadnyiqp.pdfIn PDF document text
    • http://pemizirevubel.mywebcommunity.org/the_righteous_mind_download.pdfIn PDF document text
    • http://juzezudusota.mypressonline.com/website_development_tutorialspoint.pdfIn PDF document text
    • https://tuzuvujejoru.weebly.com/uploads/1/3/4/4/134442534/nafezotu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469828/normal_5fdbe46e8b305.pdfIn PDF document text
    • https://nukawopuriw.weebly.com/uploads/1/3/4/3/134347541/40c657d615a686.pdfIn PDF document text
    • http://pasendapp.online/burp_suite_android_studioqtzli.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375200/normal_5fddfb197eaf0.pdfIn PDF document text
    • http://dalidusiz.mywebcommunity.org/75941085332.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lamupimifuban.onlinewebshop.net/what_is_the_synonym_of_orientation.pdfIn PDF document text
    • https://1c437d0a-cccb-4a8a-93f1-39e0b5126915.filesusr.com/ugd/b91566_a6da21cbcecc44cd9c123a113c2e2f7e.pdf?index=trueIn PDF document text
    • https://eadb47d6-6712-4ecd-aa5a-2cdcf2d90b86.filesusr.com/ugd/c844bf_35bbc76d12314099bd224f65e265a243.pdf?index=trueIn PDF document text
    • https://19527f6f-7821-4b33-8e58-d909ab9a203f.filesusr.com/ugd/b18fc6_1a583b74fd6e46fabdae05a7dbf39b8d.pdf?index=trueIn PDF document text
    • http://zagupijalixi.myartsonline.com/96577317503.pdfIn PDF document text
    • http://rususekobijo.myartsonline.com/soluxulivefomubivil.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_off0001103b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1103B 5284 bytes
SHA-256: 015fe9bf26719067e179f40bda33a9ff218be6bad852131e706b34e4610504de
font_01_sfnt_off00012213.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12213 11380 bytes
SHA-256: 160b3b9820df9bfdd80ef4bccc2a00a7598c7c226fa4420a79bf3025aafab41f

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