Malicious PDF — malware analysis report

Static analysis result for SHA-256 53294ba0c3d01181…

MALICIOUS

PDF

74.3 KB Created: 2021-04-04 15:50:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 5d7caae4d8a607491e0fb61076e00e7e SHA-1: 63edcfd65623742607a50c4dc5d9b12b3e369114 SHA-256: 53294ba0c3d011813c72f96fcab3c958d807a7ce6ab3d9dd38d76bd8a9db9aed
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. The document contains numerous external links, many hosted on disposable domains, suggesting an attempt to obscure the ultimate destination or spread malicious payloads. While no scripts were directly extracted, the PDF structure and link farm behavior are indicative of a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://vilenefex.ru/strik?utm_term=building+collapse+in+new+orleans+youtube PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4422627/normal_6001bbeaf0228.pdfIn PDF document text
    • http://strita.space/accident_reporting_centre_burlington_ontario5bqwb.pdfIn PDF document text
    • http://iclod.tech/honda_civic_5d_2007_service_manualh767k.pdfIn PDF document text
    • https://lopuvekire.weebly.com/uploads/1/3/0/8/130813144/rikopuwi-fiwewex-kalebazugetefe.pdfIn PDF document text
    • https://pagejenaxupiwig.weebly.com/uploads/1/3/4/3/134383440/07ac91085a2.pdfIn PDF document text
    • https://tevidozeji.weebly.com/uploads/1/3/4/8/134887032/xarupemigif.pdfIn PDF document text
    • https://lorebigida.weebly.com/uploads/1/3/4/3/134377432/zoneno_bogavi_mipupuzafukupig_nabexevakada.pdfIn PDF document text
    • http://koolmaxt.online/is_toshiba_regza_a_good_tvjdg8j.pdfIn PDF document text
    • https://ritosigom.weebly.com/uploads/1/3/1/4/131453630/b07998f3e55fcc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477629/normal_5fe4ef1e22e07.pdfIn PDF document text
    • https://bapumuper.weebly.com/uploads/1/3/1/1/131164114/vezuwebokusez_jamatopowamu.pdfIn PDF document text
    • http://defi-bet.world/bob_marley__the_wailers_-_redemption_song_meaningmeb42.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459629/normal_600a6a8b89db3.pdfIn PDF document text
    • https://wujuwali.weebly.com/uploads/1/3/5/3/135326068/a98e64f1d51.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478926/normal_605d859424631.pdfIn PDF document text
    • http://raisinshq.club/how_to_replace_bulb_in_ge_profile_microwavec6fq6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445532/normal_5fd08f1bb9211.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/746cea90-6f8a-4b80-b7eb-48a099af342f/witcher_season_2_release_date_imdb.pdfIn PDF document text
    • http://rawonuruked.rf.gd/61148437321.pdfIn PDF document text
    • http://sovizaz.epizy.com/sakodereginujuzujuxefu.pdfIn PDF document text
    • http://bevevekafoli.epizy.com/android_developer_options_usb_configuration.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4b742ce-2b28-4fe5-9ba3-8cd09bf641a9/3935184671.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b9e90a9-e37a-4648-9cf1-61ca457c9947/how_to_replace_motor_belt_on_proform_treadmill.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_off0000df79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF79 5624 bytes
SHA-256: 7c595d8cc02536f841ad11211359251081837f7fa6b08ae464bb7e69a699bac2
font_01_sfnt_off0000f2c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2C3 11700 bytes
SHA-256: 43d8fdc028c39b537df64892090c48f6592b0ed1f930eb19dcf7003744812df2