Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcfac75c0200e41c…

MALICIOUS

PDF

72.9 KB Created: 2021-03-14 16:16:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 48f4d6eef2af5ecaa47b885d564f57bf SHA-1: 7d593d968065cec9a965f5e9c2f2ef9755dee94d SHA-256: dcfac75c0200e41c364690745b483195923862e32740f9f008291946bba7aecf
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous external URIs, with one pointing to a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://bologen.ru/wix?keyword=and+of+clay+are+we+created+reading+check+answers PDF link annotation
    • https://cdn.sqhk.co/rutunidosaw/ibmyhfg/72164882445.pdfIn PDF document text
    • http://ruluzuzadol.mypressonline.com/21500269463.pdfIn PDF document text
    • http://bibopasaxuvibu.mypressonline.com/cantico_das_criaturas.pdfIn PDF document text
    • http://tebogekememesij.mygamesonline.org/political_map_of_europe_blank.pdfIn PDF document text
    • http://sokobumoxagug.scienceontheweb.net/vokesuzegikokazesa.pdfIn PDF document text
    • https://kolagigeb.weebly.com/uploads/1/3/2/7/132741023/5307023.pdfIn PDF document text
    • http://rozewevojalel.sportsontheweb.net/diccionario_tecnico_aleman_espaol.pdfIn PDF document text
    • https://pagiwidew.weebly.com/uploads/1/3/4/4/134498508/tageximeralomi.pdfIn PDF document text
    • https://cdn.sqhk.co/zejejofe/A3CQhgm/72099230072.pdfIn PDF document text
    • https://xuvelufuxilo.weebly.com/uploads/1/3/5/3/135387868/lebofumineri.pdfIn PDF document text
    • https://cdn.sqhk.co/pujixefan/jaJXjhg/download_city_island_airport_2_apk.pdfIn PDF document text
    • http://vibolofisef.mywebcommunity.org/argumentation_dans_le_discours.pdfIn PDF document text
    • https://cdn.sqhk.co/xumesapaxoku/icii8Uv/gbc_connect_canada.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ranitirunom.myartsonline.com/16083087854.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/343cc71c-6eaa-4a63-9665-0bb2c0fa8696/the_sociopath_next_door_13_rules.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6dd9221-283f-44f5-accb-43259a83e38d/relogio_monitor_cardiaco_atrio.pdfIn PDF document text
    • http://wudemexa.myartsonline.com/zalapelexerisupizofik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f281373-7c1e-4782-93bd-e86b6b232588/21892015416.pdfIn PDF document text
    • https://926da24b-d3df-4aea-ac1b-ebdf7359a9e7.filesusr.com/ugd/fef925_bcdd319bc05f4e1cbe14ddeb5f3a21cd.pdf?index=trueIn PDF document text
    • https://8dac4d01-2cd1-45d2-8b5f-6005f802adc9.filesusr.com/ugd/1f96ce_1f0df39b9b0549f4950c36da5a69ea7c.pdf?index=trueIn PDF document text
    • https://2e6726a7-2e78-456a-9fa1-8bc85c3b20a6.filesusr.com/ugd/76e31d_08a23135cec541f386b75fd3c085b56a.pdf?index=trueIn 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_off0000dd56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD56 5532 bytes
SHA-256: bc1251c6b7899cd045151410fd8e51626d22cb700e379c84e3c864049dd43e3c
font_01_sfnt_off0000f03d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF03D 11216 bytes
SHA-256: 4bb47054448116285767e277a9e5d02d2798660d1cef03c73241a10737247f73

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