Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b42157f1facc4b3…

MALICIOUS

PDF

72.3 KB Created: 2021-03-29 19:34:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 63367758991191eb5dfdc6b99741cbab SHA-1: 9f79191bfdcca5afc3404c839a0756f8cf7246fb SHA-256: 6b42157f1facc4b3169dc704dd7a446ceee6e98fa406dad4b6ef9e09ebbd2499
186 Risk Score

Malware Insights

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

The PDF file contains a significant number of external links, identified as a link farm, with many pointing to disposable hosting. This behavior is characteristic of phishing or malware distribution campaigns. The ML classifier and ClamAV detection strongly indicate malicious intent, and the embedded URLs suggest the document's purpose is to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://resalured.ru/strik?utm_term=moog+sub+37+case PDF link annotation
    • https://wigimosasalak.weebly.com/uploads/1/3/2/8/132814057/6a3b9bec4cd.pdfIn PDF document text
    • http://zilitimo.getenjoyment.net/sisepi.pdfIn PDF document text
    • http://chambreapp.xyz/catalyst_9300_config_guidech3jy.pdfIn PDF document text
    • https://xorowime.weebly.com/uploads/1/3/5/3/135307705/3594298.pdfIn PDF document text
    • http://datulosuwila.iblogger.org/formation_of_fructose.pdfIn PDF document text
    • http://milansit.space/53901763934818qt.pdfIn PDF document text
    • http://muzibatixabu.mypressonline.com/honda_6500_generator_manual.pdfIn PDF document text
    • http://klokisik.space/jubolodefruig.pdfIn PDF document text
    • http://bomepufibawil.scienceontheweb.net/silasa.pdfIn PDF document text
    • https://vabofofed.weebly.com/uploads/1/3/4/3/134337048/naxezelakulot.pdfIn PDF document text
    • https://xasedomag.weebly.com/uploads/1/3/1/0/131071243/bf9259f536ea5a.pdfIn PDF document text
    • http://palupalukagu.mygamesonline.org/gosesevoduxafuvupigoz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mijikabetabup.rf.gd/11777221814.pdfIn PDF document text
    • https://54179944-c6a3-49b3-9462-5d1939b6aff2.filesusr.com/ugd/49f5ef_a606913ebe2b4dd3838ca64df93c3d78.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xakusineba/keto_diet_plan_veg.pdfIn PDF document text
    • https://s3.amazonaws.com/jigezilor/command_prompt_commands_network_troubleshooting.pdfIn PDF document text
    • https://510b81f6-be4e-4e40-9acf-3f60af495837.filesusr.com/ugd/5f226b_3ac55c14e099474da6023a9cbde69f91.pdf?index=trueIn PDF document text
    • https://4e16d9da-0927-4957-8a4e-4544605d6055.filesusr.com/ugd/d7e550_fe20faa58cde4611bb12d61f09103f20.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lakujusitejojet/game_naruto_vs_bleach_mugen_apk.pdfIn PDF document text
    • http://maduzelur.epizy.com/rexirawepavirawodovimax.pdfIn PDF document text
    • http://ligoroxenafof.atwebpages.com/mugobabofenakakibuzivu.pdfIn PDF document text
    • https://s3.amazonaws.com/falejogajir/free_printable_physical_science_worksheets.pdfIn PDF document text
    • https://69f1164a-dcd3-4310-9fb4-3b67f03bdbb0.filesusr.com/ugd/9d7282_1519bdb92f6d4e05a9fba3066766fe89.pdf?index=trueIn 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_off0000de03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE03 5228 bytes
SHA-256: 4ccb7bd5e8055b32028161f1a68b4ee1003028629ff24a80e661bae20233876f
font_01_sfnt_off0000effb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFFB 10732 bytes
SHA-256: f88e6e2ab0822e232fb6d5d4e791f023559fddef37826ad501fd20ac99fad88e

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