Malicious PDF — malware analysis report

Static analysis result for SHA-256 92c8e304d29be834…

MALICIOUS

PDF

85.0 KB Created: 2021-03-28 23:17:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 1419d348df87e82f6321b4dce7782830 SHA-1: 923366dbc033c71660ddd301a6ab778b8d945458 SHA-256: 92c8e304d29be83494b6944fb11450b704538b94ff955de75aa05a246b1ec6bd
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://baarspo.ru/wix?keyword=nickel+and+dimed+scrubbing+in+maine PDF link annotation
    • https://cdn.sqhk.co/rifojimuna/cehjfjf/dental_assistant_pro_llc-_columbus.pdfIn PDF document text
    • https://cdn.sqhk.co/ruxuvedije/ZiK47e9/bus_driving_simulator_pc_game_download.pdfIn PDF document text
    • http://nojigopagapusu.mygamesonline.org/dedopimovajenoxunu.pdfIn PDF document text
    • https://cdn.sqhk.co/zitiwofiru/c8hgjjj/wipunoridipix.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://womidelere.myartsonline.com/85475347814.pdfIn PDF document text
    • https://30c0d994-bee2-4d79-bc91-d4aaa7251653.filesusr.com/ugd/0962d9_774da39fae9d44f1ba3bed4fcf9b43a3.pdf?index=trueIn PDF document text
    • https://56db2a4d-09ce-4ff6-a558-abb1d6727cd4.filesusr.com/ugd/003b86_c3916a0029fa42b296aa18e44b08ba3b.pdf?index=trueIn PDF document text
    • https://de74b992-0de1-402f-a2cc-438209b178b2.filesusr.com/ugd/2693ef_b01daafa8d7e4c2c81e8cbb4135ef323.pdf?index=trueIn PDF document text
    • https://f2d828cf-06d9-46ea-85af-d88b0bc20d44.filesusr.com/ugd/501a20_0082213502b847e0ae825421973e1985.pdf?index=trueIn PDF document text
    • https://f6142301-0c02-44dd-b2c5-62cf9b3cd0dc.filesusr.com/ugd/ebfdba_d18ce10f6e1d424dada247262babd9ed.pdf?index=trueIn PDF document text
    • https://1cd0d4d5-11d4-440c-a307-81f73801f601.filesusr.com/ugd/f0e51d_838beca1b5734a2aa343fa4edc8bc313.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0ffa103-9cd8-4198-ae99-c0837c84054e/honda_rancher_350_tie_rods.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3ccec1c-dab4-488d-a7b4-5f279d9644c6/easy_korean_reading_for_beginners_free_download.pdfIn PDF document text
    • http://budusujebosew.epizy.com/85103401773.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b7a391a-a843-430c-8c73-4faf4e4f42b4/what_is_the_meaning_of_prepaid_expenses_in_accounting.pdfIn PDF document text
    • https://d04c2b29-3777-4fe6-aaa9-ab96f87c3324.filesusr.com/ugd/43eb95_0576c86214a9444d9de9d0a19250341f.pdf?index=trueIn PDF document text
    • http://vuxazobug.rf.gd/61752950182.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011046.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11046 5432 bytes
SHA-256: a0e9a616b3fb11e13e0b369022df247c338479790110ac02fb9b6cb15e9ac369
font_01_sfnt_off000122b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122B2 10488 bytes
SHA-256: b87d54380e754c7fb299418e3f57b87834c5bed62290a7cb9adbbe9dc55dc0e7

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