Malicious PDF — malware analysis report

Static analysis result for SHA-256 81c1df566c2b9b7d…

MALICIOUS

PDF

100.9 KB Created: 2021-05-22 04:27:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 5de1316171435e21a9430f8a591b7093 SHA-1: 68ecee9d0595e590a413df248836ce6f88a467c4 SHA-256: 81c1df566c2b9b7d3a31e5aced8edcd75222b14eeabcae2360c4f9c0fe68c007
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. It contains an embedded URI pointing to a suspicious domain, 'lozipotod.ru', which is likely used to host a phishing page or download a secondary payload. No scripts were extracted, but the presence of the malicious URI strongly suggests a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://lozipotod.ru/strik?utm_term=comparing+religions+kripal+pdf+free PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4464862/normal_5fff62cdc8c22.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387933/normal_5fff15c8837e1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408990/normal_60663705152e2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472200/normal_60219afdaa87c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451230/normal_5febb39a1a504.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388407/normal_5ffaa2bf7e0ed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470985/normal_6035b269b739e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389604/normal_5fde8d11ba4f5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425912/normal_5fc95e361c3c1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380545/normal_604b9604a779a.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/legenapi/divergent_free_ebook.pdfIn PDF document text
    • https://s3.amazonaws.com/tujeviwakirawu/costo_de_entrada_al_circo_de_la_chola_chabuca.pdfIn PDF document text
    • https://s3.amazonaws.com/dukexajuj/43533170111.pdfIn PDF document text
    • https://s3.amazonaws.com/nijudow/jiponome.pdfIn PDF document text
    • https://s3.amazonaws.com/sirilagewuga/62088318133.pdfIn PDF document text
    • https://s3.amazonaws.com/telasebisu/alikiba_new_songs_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/fatisake/decimals_to_fractions_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/satulibaren/lupirodebonuxijelefolid.pdfIn PDF document text
    • https://s3.amazonaws.com/sulasatevirexo/13391301739.pdfIn PDF document text
    • https://s3.amazonaws.com/bitizopovopaso/62197222076.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_off0001500f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1500F 5328 bytes
SHA-256: 6189af18afb344e369a27c57550be6f468664966ac203b7bd9a4d9068cb1f073
font_01_sfnt_off00016213.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16213 10712 bytes
SHA-256: fe8aa748639d79a486e9644cfe3ca7ae7272c55240303eeecd590e97e622a51e

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