Malicious PDF — malware analysis report

Static analysis result for SHA-256 5320aa8d134a00b1…

MALICIOUS

PDF

71.4 KB Created: 2021-03-11 19:40:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: e7315d5c6d7bd698ef3ffb922aafe6c4 SHA-1: 70b167e0f071f2847c773173fd7a8cbf44e09c0c SHA-256: 5320aa8d134a00b1258ac31d0b15098cc02d319293acf41279d801747ef0904a
194 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 a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially harmful content. The document body, though partially corrupted, suggests a lure related to appliance troubleshooting, which is a common tactic for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://botokaw.ru/wb?keyword=how%20to%20reset%20my%20hotpoint%20oven PDF link annotation
    • https://givurubikuz.weebly.com/uploads/1/3/1/4/131482907/02ed3.pdfIn PDF document text
    • https://dadekojulaza.weebly.com/uploads/1/3/4/3/134320805/dolukebozisozirokuso.pdfIn PDF document text
    • http://olivamebel.com/82378014111drunc.pdfIn PDF document text
    • http://duplicwcnj.space/how_to_find_potential_difference_from_electric_fieldsy4bj.pdfIn PDF document text
    • http://phulop.store/milafomaigtuo.pdfIn PDF document text
    • http://juilopkiretlo.ru/237421879353xbip.pdfIn PDF document text
    • https://mebedepubini.weebly.com/uploads/1/3/0/8/130813558/a7f450b8a98d.pdfIn PDF document text
    • https://vebodejivab.weebly.com/uploads/1/3/2/3/132302978/344588.pdfIn PDF document text
    • https://pudijeda.weebly.com/uploads/1/3/4/5/134586696/vorizakixosavipom.pdfIn PDF document text
    • https://kibalenujodoziz.weebly.com/uploads/1/3/0/7/130776895/dujefutofanigo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409095/normal_603777f65d5c5.pdfIn PDF document text
    • https://govobozof.weebly.com/uploads/1/3/5/3/135315692/1995076.pdfIn PDF document text
    • https://motefeka.weebly.com/uploads/1/3/4/1/134108707/gazirititovuxuz_jigojos_xezasabuj.pdfIn PDF document text
    • http://bred-enligne.com/lutasilegokamakit4q168.pdfIn PDF document text
    • http://wdd13.ru/canada._ca_ei_internet_reporting_loginqixod.pdfIn PDF document text
    • http://bupetud.xyz/96579813686kclnl.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477408/normal_60208e90f3afd.pdfIn PDF document text
    • http://salonvarna.com/purevunopubaxo9ydg4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378845/normal_6022d78f5d15c.pdfIn PDF document text
    • https://xevefoworux.weebly.com/uploads/1/3/1/3/131380592/xelafitamajiz-sufukod-povesumevasa-pelikajipoj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000dc1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC1C 5032 bytes
SHA-256: 24774403eb8667144ce9c2f442424eaab76f8cc0662fbb6cdf0bc30770db9e17
font_01_sfnt_off0000ed2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED2B 10344 bytes
SHA-256: dda03fb6482ad7e9348f2c901057c43c4e1205f59f2f785e30c38758f5f848b6