Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb0a8cfc6a4e1ba7…

MALICIOUS

PDF

65.9 KB Created: 2021-02-14 20:06:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 0079e7d00770454149cb54c5329ec6a6 SHA-1: b90e98f27de22c03e2b5800e5224e6ae150cfeea SHA-256: bb0a8cfc6a4e1ba7ca84e7dbc78064b07b55dc2c3b1def8066c5bda5acbaaa6b
192 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic identifying a redirector to known malicious infrastructure at 'https://crophysi.ru/wb?keyword=aradhana%20stuti%20aradhana%20ringtone'. The ML classifier also flagged this PDF with high confidence. The presence of a 'Download' button lure further supports a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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://crophysi.ru/wb?keyword=aradhana%20stuti%20aradhana%20ringtone In PDF document text
    • https://balolenitazir.weebly.com/uploads/1/3/1/0/131071159/8552921.pdfIn PDF document text
    • http://pe50off.info/dimiwiguwenawuxetfi61.pdfIn PDF document text
    • http://zozagemidifisep.22web.org/nevodipatajowar.pdfIn PDF document text
    • http://mrshadow.net/formatting_numbered_lists_in_apa75luj.pdfIn PDF document text
    • http://ketousa.site/kiboxefasibiwoxizosu04sh4.pdfIn PDF document text
    • http://helplnstagramcontact6088756.com/uber_eats_mexico_oficinas0tkt4.pdfIn PDF document text
    • https://pevunefimexog.weebly.com/uploads/1/3/1/0/131070247/d8e62e1a13c.pdfIn PDF document text
    • https://gitosupogule.weebly.com/uploads/1/3/2/7/132741155/6779362.pdfIn PDF document text
    • http://nowatora.22web.org/3671179008.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pawubiba.epizy.com/50806764296.pdfIn PDF document text
    • http://sasitegeke.epizy.com/anesthesia_movie_300mb.pdfIn PDF document text
    • http://runapapaxezupow.rf.gd/8348625541.pdfIn PDF document text
    • https://s3.amazonaws.com/suzujewa/budgeting_template_nz.pdfIn PDF document text
    • https://s3.amazonaws.com/kezemiradigu/haggadah_in_english.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_off0000c6f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6F6 5044 bytes
SHA-256: b046b1a986d9ff30c0e755e7d4a363532621924cb208c09144fa537b8ca1cd7a
font_01_sfnt_off0000d812.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD812 10224 bytes
SHA-256: e3d45884ec4c8c44f26452b12a1bdeb037126d7e06aa5affb3cac305b0fe2521