Malicious PDF — malware analysis report

Static analysis result for SHA-256 10452b3a84dd5f49…

MALICIOUS

PDF

74.7 KB Created: 2021-06-01 14:46:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 76c27e1095d988ae13b86f72643bf1b9 SHA-1: 089458d8cd8dd8dbeb8a459dc511251876d0e6fd SHA-256: 10452b3a84dd5f4945a2053502ee52659d60bd9bbb0c9739b14a0e4fece18490
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it contains a link farm with numerous external URLs, many hosted on disposable domains, suggesting a phishing or SEO manipulation scheme. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attempt to redirect users to potentially harmful 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://ketchas.ru/pbw?utm_term=what+are+the+objectives+of+educational+technology PDF link annotation
    • https://xojutezakiveze.weebly.com/uploads/1/3/5/3/135318362/koduk-zaxodapumuwil-totogaduj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500187/normal_605c3eac83a69.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445731/normal_6027560ad7ca9.pdfIn PDF document text
    • https://paxolobiwoke.weebly.com/uploads/1/3/1/1/131163878/1673929.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476939/normal_605fb6cdeaf69.pdfIn PDF document text
    • https://vejotawugupexo.weebly.com/uploads/1/3/4/7/134756202/d3815d00a886.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420438/normal_5fcd3fbb47962.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470843/normal_5fdf4ef6ae6a8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/44d105b7-f758-4466-82b2-4c1710f2fca9/98921341208.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3efd4234-1ac3-4903-965b-cb370e59ae47/what_is_darren_till_worth.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69fe4316-4b65-41aa-8b48-2e6d6aec820b/10850206410.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/031c63a2-c67e-4edf-986e-a6404f77fc52/vosajefurumagojaruba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee8f9e4e-e13a-45bf-a507-da21e1daed45/40263567411.pdfIn PDF document text
    • http://tusawijer.pbworks.com/f/8230347147.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b38d75b-3889-469f-a760-2806ccc7afa1/36969134921.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/edb2db90-e9ef-4ade-87a0-1f2cf57c4ba7/what_does_the_song_neon_moon_mean.pdfIn PDF document text
    • http://xovelezid.pbworks.com/w/file/fetch/144416688/mission_impossible_flute_sheet_music_easy.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_off0000e53e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE53E 5672 bytes
SHA-256: f4906952aeef63e80878da2d8c342d59ca1af0afdb9f96ed781aae5be17d65be
font_01_sfnt_off0000f8a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8A6 10984 bytes
SHA-256: 7134bfb381895b5be45de4a65e455fdef9fa45f277eabc9aaa78434e8177bf92

Open this report in the interactive analyzer, or submit your own file for analysis.