Malicious PDF — malware analysis report

Static analysis result for SHA-256 48f1c59bf4eaa037…

MALICIOUS

PDF

79.8 KB Created: 2021-02-20 21:30:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 52e9d494e33f82cfbdd425cbfc8381be SHA-1: 31c7cff6699e14d9887e8d3babb4df14a7c01ee4 SHA-256: 48f1c59bf4eaa03709bf123d69b979f5af0689b61001539b5085f09ea5cd7370
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm or phishing campaign. While no scripts were directly extracted, the PDF structure and embedded URLs indicate an attempt to redirect users to malicious content.

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 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://jacksth.ru/123?utm_term=garmin+oregon+600+vs+700 PDF link annotation
    • http://lovelyhouse.online/petta_audio_launch_videowuxbx.pdfIn PDF document text
    • https://cdn.sqhk.co/sekigozujeme/hjieO2k/8113186981.pdfIn PDF document text
    • https://cdn.sqhk.co/rowofabuf/v6hgoja/street_soccer_flick.pdfIn PDF document text
    • https://cdn.sqhk.co/dodazija/ifhijfm/8203499417.pdfIn PDF document text
    • https://cdn.sqhk.co/mewivupa/dTYnsH9/ms._pac-_man_countercade.pdfIn PDF document text
    • https://cdn.sqhk.co/zunesunatiri/gdktggc/16066064095.pdfIn PDF document text
    • https://pebabole.weebly.com/uploads/1/3/4/6/134698512/minunisoruvodapumom.pdfIn PDF document text
    • https://cdn.sqhk.co/zuxosutuku/dgjNo0E/subway_surf_online_hacked.pdfIn PDF document text
    • https://guxovixig.weebly.com/uploads/1/3/5/3/135317997/nonowemax.pdfIn PDF document text
    • https://cdn.sqhk.co/sodelaranu/dzYhc9H/92110730491.pdfIn PDF document text
    • https://zuwojutiraz.weebly.com/uploads/1/3/4/7/134729165/1285205.pdfIn PDF document text
    • https://cdn.sqhk.co/xejudawadoni/fqy2heK/column_blitz_battleship.pdfIn PDF document text
    • https://vepimogarib.weebly.com/uploads/1/3/4/8/134856589/wufufuwoxurevavif.pdfIn PDF document text
    • https://cdn.sqhk.co/rujamuzizogo/jhigBjh/blocky_roads_mod_apk_unlocked.pdfIn PDF document text
    • https://cdn.sqhk.co/tatidukigag/hNygjWQ/fidefegibepa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lakelasu.rf.gd/influencer_agreement_template.pdfIn PDF document text
    • http://bukarujinadir.epizy.com/sas_import_excel_xlsx_sheet.pdfIn PDF document text
    • http://rupeguv.epizy.com/70923770834.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_off0000fb4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB4E 5440 bytes
SHA-256: 90bb51d049602e5efc25bb6c983f26d7721d552ad2c9d21dc175f6b442a3ccb4
font_01_sfnt_off00010dc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DC4 10796 bytes
SHA-256: ced078d0986fe3d8e5a3740e587aa88479c8057b37a68571030c4c548ac8e3cd

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