Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e22e66f82349087…

MALICIOUS

PDF

73.9 KB Created: 2021-04-01 16:16:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 853616b7e6471e612de0ee0de03b0f62 SHA-1: b0e2234424e225733c896ab8a86f66c97a29be44 SHA-256: 3e22e66f823490875318fc53432af682d95addd494ea25eac5a968a0dd3db4dc
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external links, many pointing to disposable hosting, suggesting a link farm designed to redirect users to potentially harmful sites. The presence of the 'utm_term=setup m audio fast track pro' parameter in one of the URLs indicates a lure to download or interact with fake software.

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://resalured.ru/strik?utm_term=setup+m+audio+fast+track+pro PDF link annotation
    • https://libadelalisam.weebly.com/uploads/1/3/4/5/134579317/tikijogafinixum.pdfIn PDF document text
    • https://mirezavofuju.weebly.com/uploads/1/3/4/8/134870541/vaxijet.pdfIn PDF document text
    • https://gakosokilexavum.weebly.com/uploads/1/3/2/6/132695298/renasutelobuxuw.pdfIn PDF document text
    • http://bimonetejatoleb.mygamesonline.org/to_the_lighthouse_stream_of_consciousness.pdfIn PDF document text
    • https://kupifibadobibe.weebly.com/uploads/1/3/4/5/134512214/balilumogexiful-likizuj.pdfIn PDF document text
    • http://axecheat1.xyz/ti-nspire_cx_cas_student_software_crackz6bp8.pdfIn PDF document text
    • https://minaraxu.weebly.com/uploads/1/3/4/7/134765114/792ffbfb78.pdfIn PDF document text
    • http://scrlt.xyz/retefaponutifebukdx5aq.pdfIn PDF document text
    • https://lofativunami.weebly.com/uploads/1/3/4/5/134581692/bubinuv.pdfIn PDF document text
    • https://wuvotawek.weebly.com/uploads/1/3/4/8/134872633/sexisimove.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://4779f2f8-a33e-4327-9c78-21ee0bcf4620.filesusr.com/ugd/31bf02_0c5563416f23470e888517b7729bb8bb.pdf?index=trueIn PDF document text
    • https://6bc553e5-d0de-4278-827a-c77c8eb32fbd.filesusr.com/ugd/4a6c57_9eac963cfc1a40ada8fb3affd4578caf.pdf?index=trueIn PDF document text
    • https://dbba0f06-1911-40f0-8c80-a2638c7f81cc.filesusr.com/ugd/b13fd1_48b87a97592b462bb84efabaaf027e34.pdf?index=trueIn PDF document text
    • https://6f81cef9-66a2-447d-9e1d-4c0427ef15c5.filesusr.com/ugd/4d935e_4f2821cc53d5408199e284c5a31b4188.pdf?index=trueIn PDF document text
    • https://7f3dc8b3-869c-44c5-82eb-14ae88d57796.filesusr.com/ugd/dc4ca1_b0ead774321047c887d9b748cbdf2618.pdf?index=trueIn PDF document text
    • https://d78d2789-9aef-4bfd-88be-9093bec910ef.filesusr.com/ugd/87a178_b4b1e7b381af43969cdf78c3dea2e989.pdf?index=trueIn PDF document text
    • https://a2ae8793-a99f-480d-a3bc-849ef63d34f7.filesusr.com/ugd/cc207a_30577f96676748f68bb33ab40ea7a4f0.pdf?index=trueIn PDF document text
    • http://pazepoxi.atwebpages.com/brche_regeln.pdfIn PDF document text
    • http://sudexixurijaxoz.atwebpages.com/81035607839.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_off0000e0d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0D0 5436 bytes
SHA-256: 05cfcb738e41fd2a41684750a9c40cd5db97210585eae39eb59ce247d9798900
font_01_sfnt_off0000f33c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF33C 11568 bytes
SHA-256: c541ad50d4a11a233ab21abe7ac5df9e264f617644a761d6889bbe2b29466bb3