Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9200a4c5f8ee4f9…

MALICIOUS

PDF

78.2 KB Created: 2021-03-12 16:47:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: a36361c379034f820f68c99ceaf608de SHA-1: 46bc8951b3cbe892e49cf19ff1e483c609906492 SHA-256: c9200a4c5f8ee4f99fa4f225197c66396c92c0f31c9ca502892be81adbbd4e77
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many of which point to disposable hosting and appear to be part of a link farm. The primary URL, 'https://xajibur.ru/123?utm_term=pan+card+application+uti+pdf', suggests a phishing lure related to a PAN card application. The ClamAV detection and ML classifier strongly indicate malicious intent, likely to redirect users to phishing or malware 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://xajibur.ru/123?utm_term=pan+card+application+uti+pdf PDF link annotation
    • http://mir23.xyz/hole._io_local_multiplayer_gonegmbm1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366632/normal_5ff370a3c2715.pdfIn PDF document text
    • https://pofimutazotoxo.weebly.com/uploads/1/3/4/0/134000188/tufaxikofuj-vedowevej-jijibe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494429/normal_6031232c21d0f.pdfIn PDF document text
    • https://vunufagedumuved.weebly.com/uploads/1/3/4/7/134740761/3081546.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413578/normal_5ff0e361d815e.pdfIn PDF document text
    • https://xunijududivajol.weebly.com/uploads/1/3/0/9/130969830/zesemexulofo_foxano.pdfIn PDF document text
    • http://teksol.xyz/618369605861by39.pdfIn PDF document text
    • https://dikufakeg.weebly.com/uploads/1/3/5/3/135348043/vesubazirave.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418583/normal_60086ad57d3cd.pdfIn PDF document text
    • https://buwavazazaradig.weebly.com/uploads/1/3/3/9/133999961/vawuniwob_vejiwepi_patek_nuwilisiwumizut.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/88135ce1-5bd4-435e-b107-e1436d539448/51024020051.pdfIn PDF document text
    • https://s3.amazonaws.com/lakujusitejojet/20614807562.pdfIn PDF document text
    • https://5b2b9875-3923-4577-9ef6-0527498c95e7.filesusr.com/ugd/4e6dd5_0999f2e2c7bc4c249545a803782a3c45.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/juzinaramip/35506473521.pdfIn PDF document text
    • https://49b821e7-ee7e-41b4-809b-d0417b8c1ddf.filesusr.com/ugd/927743_754bf787a48946ac91fce23f9e3a4d40.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jojitagifuva/voxelsniper_cheat_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/ronenitevodo/20561693220.pdfIn PDF document text
    • https://6754c94d-8795-460a-880d-d127bb37d4d4.filesusr.com/ugd/2383dc_8c6efd3774a1480cb963f707540d9b9f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/44478fb2-33e6-49c4-a7d4-82c28d9c6d6f/rakatu.pdfIn PDF document text
    • https://97d49ff2-d914-4ae4-8ac8-5e5cf5f77cad.filesusr.com/ugd/6350c7_66e7e1cd07f542cc91c478bdba9b2b7d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/difigomisosak/jibesovokusafixelerapibem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7a55f9b-a954-4b44-8357-4dbfa00e6c02/map_of_bowling_green_state_university.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_off0000f6dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6DC 4972 bytes
SHA-256: e5382442306bb60851bac7e6f99f033b4b0a16b3a6a57d5830decd8477d225d0
font_01_sfnt_off000107db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107DB 10392 bytes
SHA-256: 34f4340a914e7655b662970d04c0d5b6145151e7ea0e7d880b84a47af42b10ac