Malicious PDF — malware analysis report

Static analysis result for SHA-256 c192b852ccc24200…

MALICIOUS

PDF

73.2 KB Created: 2021-03-04 04:45:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: d015441cd844a92cb4a0f2da6a8f81ec SHA-1: 9f5863d75c223655f0a02422f6eab60d33d6497a SHA-256: c192b852ccc242004c53b293d9113975499ad5e05701fddcdb336a0fee96f891
146 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics and a machine learning classifier as malicious, specifically as a phishing or scam attempt. The 'SE_CALLBACK_LURE' heuristic indicates the document likely contains a phone number presented in a context designed to trick the user into calling, consistent with callback phishing or tech-support scams. While no scripts were explicitly extracted, the presence of external URIs and the nature of the heuristics suggest an attempt to direct the user to malicious content or initiate a fraudulent interaction.

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 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://baarspo.ru/wb?keyword=panasonic%20phone%20manual%20kx-dt343 PDF link annotation
    • http://coins24h.com/la_leyenda_de_orfeo_y_eurdiceeint5.pdfIn PDF document text
    • http://sorekivobu.22web.org/78849233307.pdfIn PDF document text
    • http://fezelaradelemuj.22web.org/29336900860.pdfIn PDF document text
    • https://cdn.sqhk.co/gedugari/bX1jhjf/segipalabi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374979/normal_5fcaf3858b142.pdfIn PDF document text
    • http://reactivaperu-viabcpi.com/watch_neon_genesis_evangelion_online7dtui.pdfIn PDF document text
    • https://dagigokes.weebly.com/uploads/1/3/0/7/130739756/rububora.pdfIn PDF document text
    • https://cdn.sqhk.co/bapisolel/KKhhicr/wish_meaning_in_english_grammar.pdfIn PDF document text
    • https://cdn.sqhk.co/xusawikorut/YipLQZW/digestive_system_process_summary.pdfIn PDF document text
    • http://dream-stat.ru/spreadsheet_compare_different_columnsa8eoh.pdfIn PDF document text
    • http://tdsevsvet.ru/fokedajojonixufelow7zej6.pdfIn PDF document text
    • https://raxagipob.weebly.com/uploads/1/3/4/8/134883443/1057031.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://sasaroguri.rf.gd/pagotisubegemo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE4D 5516 bytes
SHA-256: 9cf0d7413d23c0a3ccebfc85e04174fb716536542d2078f15340765409178d66
font_01_sfnt_off0000e0ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0ED 12128 bytes
SHA-256: b777d3b681046d52ba4b85fef3dff3f75888c78997f964204b88193a320e7be5
font_02_sfnt_off00010a0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A0C 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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