Malicious PDF — malware analysis report

Static analysis result for SHA-256 22fb0a43b4ab29b0…

MALICIOUS

PDF

79.9 KB Created: 2021-02-24 07:28:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: ac8ea3aad1933c91aefb24699d45050c SHA-1: 1b7895a9a0b401f6794fd5dfc08bc149e019cc53 SHA-256: 22fb0a43b4ab29b017acbcddfd9d5e275c6bac49144f7563cd3961480cebf9b9
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious content. The primary attack vector appears to be a phishing lure, directing users to a suspicious URL that is disguised as a search result. No scripts were extracted, but the PDF structure and embedded URLs strongly suggest a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://jottigo.ru/strik?utm_term=how+to+solve+cube+in+20+steps PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4386087/normal_5fdbe1c917c64.pdfIn PDF document text
    • https://cdn.sqhk.co/tinulafi/hejevie/big_blue_marble_academy_banking_way_greenville_sc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450898/normal_5fc8ebd568b3f.pdfIn PDF document text
    • https://cdn.sqhk.co/molodomo/phbnEha/train_sim_world_2_ps4_discount_code.pdfIn PDF document text
    • http://rawotanu.iblogger.org/tortilla_flats_arizona_weather.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450506/normal_5fffee1157e82.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380700/normal_5fd324f71ab4f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://budokukikaririd.rf.gd/19971409550.pdfIn PDF document text
    • http://dimizisunope.epizy.com/17039730880.pdfIn PDF document text
    • http://kiwuvapinemugi.rf.gd/norme_afnor_x50-_750.pdfIn PDF document text
    • http://wiratobut.rf.gd/what_is_the_setting_of_the_story_hansel_and_gretel.pdfIn PDF document text
    • https://s3.amazonaws.com/nagudo/91943866857.pdfIn PDF document text
    • http://kivosokefenugez.epizy.com/povulunulu.pdfIn PDF document text
    • http://jikokajogov.rf.gd/waxajuz.pdfIn PDF document text
    • https://s3.amazonaws.com/tuzamada/25102717026.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_off0000fd27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD27 5148 bytes
SHA-256: 7b2d119337cc57f37f1716f179e2118b9dded7efa06b6693dc8025989427087d
font_01_sfnt_off00010edd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EDD 10652 bytes
SHA-256: b70007ca94630d3a88623df1da52ef931f825ba4131f684f993de79aa63d5f86

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