Malicious PDF — malware analysis report

Static analysis result for SHA-256 e21211e63fad99b3…

MALICIOUS

PDF

82.0 KB Created: 2021-03-04 01:23:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 71373ea1889acf37e0e00ac6da95f613 SHA-1: 395170e94a0321cac9a0f166669a8fe7c55a8331 SHA-256: e21211e63fad99b35a5878cb0665efffbec718685d660a448ff6ef54ed60a575
186 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, identified as a link farm. The primary URL, 'https://xezojetit.ru/award?keyword=what+does+deviant+mean+in+criminology', suggests a potential phishing or SEO manipulation tactic. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate malicious intent, likely to redirect users to potentially harmful sites.

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://xezojetit.ru/award?keyword=what+does+deviant+mean+in+criminology PDF link annotation
    • https://voxonevixes.weebly.com/uploads/1/3/4/3/134383310/giwulopisodu-waxobobulo-digasajisesedap.pdfIn PDF document text
    • https://wetebaxa.weebly.com/uploads/1/3/4/3/134343617/pudafakibedeka-nividimimajogor.pdfIn PDF document text
    • https://cdn.sqhk.co/dibirolinu/ehbiahi/best_state_park_rv_camping_florida.pdfIn PDF document text
    • http://tigexesuni.22web.org/sesixojaxesokalebanuga.pdfIn PDF document text
    • https://sitegevom.weebly.com/uploads/1/3/4/6/134664280/59786bf2612b30.pdfIn PDF document text
    • https://sararilaba.weebly.com/uploads/1/3/1/4/131482808/07587b8b71c.pdfIn PDF document text
    • https://gixisisopovi.weebly.com/uploads/1/3/4/7/134713576/601672.pdfIn PDF document text
    • http://lubenoredeji.mypressonline.com/99138971261.pdfIn PDF document text
    • http://rowajenuw.iblogger.org/cyborg_android_difference.pdfIn PDF document text
    • http://pejurazatox.iblogger.org/nazm_hikmet_in_ak_iirleri_kitab.pdfIn PDF document text
    • https://wudigunufite.weebly.com/uploads/1/3/4/6/134611509/07817.pdfIn PDF document text
    • http://nutetuxiv.mygamesonline.org/wedubajejajeli.pdfIn PDF document text
    • http://tusiteguluvora.getenjoyment.net/xarukaxovuz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sezewu/whatsapp_plus_2019_latest_version.pdfIn PDF document text
    • https://s3.amazonaws.com/nawuvud/75794315433.pdfIn PDF document text
    • http://bopubinenunoxow.rf.gd/personal_balanced_scorecard_definition.pdfIn PDF document text
    • http://rijogutigoxek.epizy.com/98293936036.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_off000104eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104EB 5528 bytes
SHA-256: d43a0e60506dce5bb127f8d3fb4ace96120977d5a8bb85f906853d2af8a86bea
font_01_sfnt_off0001179e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1179E 10440 bytes
SHA-256: 0c6312ecfdb000ec1483aef42097dbf9a95b28c207252552b2dab5463cb6ce46

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