Malicious PDF — malware analysis report

Static analysis result for SHA-256 9596b5f812323258…

MALICIOUS

PDF

76.6 KB Created: 2021-06-06 04:05:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 8ac051b8a9aa87a5dd34c5c8a9f5d0ac SHA-1: 0405359890c0e176ff018030f2a979a1d6d5635a SHA-256: 9596b5f812323258f9655372be7182b53e5926d05c1234678a1cb6021c1e194e
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, specifically as a phishing or trojan delivery mechanism. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The primary URL, 'https://infrive.ru/pbw?utm_term=xld+brainpower+motor+controller+manual', appears to be part of this scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://infrive.ru/pbw?utm_term=xld+brainpower+motor+controller+manual PDF link annotation
    • https://zuvagojajom.weebly.com/uploads/1/3/5/3/135398962/f2e780f947643b.pdfIn PDF document text
    • https://tiwebusimevadeb.weebly.com/uploads/1/3/5/3/135346158/fivufewukutagenenufe.pdfIn PDF document text
    • https://zitipijasidigor.weebly.com/uploads/1/3/0/8/130874434/3014265.pdfIn PDF document text
    • https://penuwepilaxol.weebly.com/uploads/1/3/4/7/134756509/505794f.pdfIn PDF document text
    • https://jawifeguviweti.weebly.com/uploads/1/3/2/3/132302916/b1624bb.pdfIn PDF document text
    • https://duduzigofusu.weebly.com/uploads/1/3/2/8/132815892/3499177.pdfIn PDF document text
    • https://babuzusevajuwo.weebly.com/uploads/1/3/4/8/134878483/lubezis-devuwo-jurumoxozewob.pdfIn PDF document text
    • https://jokilexagazoxo.weebly.com/uploads/1/3/4/6/134602179/2916542.pdfIn PDF document text
    • https://fikelepokaretes.weebly.com/uploads/1/3/1/3/131397971/dolofesasoduf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vosebim.pbworks.com/f/lelabowulix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/462a2932-8534-4638-a16e-978dd419ab52/sowoseze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c05c230a-bb8e-45a0-9e1c-7d45af7239a1/zovitepavemabasij.pdfIn PDF document text
    • http://dodosuta.pbworks.com/w/file/fetch/144693780/map__co_x_tpr.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4ecb694-48df-46ba-add3-22dc50f8dbe1/11108919005.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/505b04a4-4c0d-448a-ae21-fa4b42e2c9e7/fajebosojepimibupan.pdfIn PDF document text
    • http://ziriwuru.pbworks.com/w/file/fetch/144598698/96822145895.pdfIn PDF document text
    • http://tugewuvog.pbworks.com/w/file/fetch/144617613/5642555821.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f77e3b0a-0ec9-46bc-8663-9b9e7a37cb1c/what_are_the_three_most_common_body_planes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a3ce055-5c14-414e-8aef-0523389a0fa5/tupedinafujiguwusiva.pdfIn PDF document text
    • http://maxasol.pbworks.com/f/9_snf_matematik_kmeler_konu_anlatm_test.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_off0000f0a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0A8 5248 bytes
SHA-256: 6173643bdf1ac4d326ed1ca2aa08fa5d512c7f75b5591d2b67b829db57266772
font_01_sfnt_off00010272.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10272 10116 bytes
SHA-256: c1733511cd179702d79e6281c798f069a19595bbfffa0ff06beb5864d8a5519c