Malicious PDF — malware analysis report

Static analysis result for SHA-256 406a20645f7ecb2d…

MALICIOUS

PDF

79.3 KB Created: 2021-03-09 20:10:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 25a2a266b83435d12d5bada722286914 SHA-1: d8c6cee883102484aa4098c220cbb7b79bd9a33a SHA-256: 406a20645f7ecb2dc718a1dc6ee976fc9f2adbb01c52c3e0600274d5e9bb7696
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which are hosted on disposable domains, suggesting a link farm or phishing operation. The document body, though heavily obfuscated, contains metadata related to 'release notes template software development', which is likely a lure to disguise the malicious nature of the links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://botokaw.ru/123?utm_term=release+notes+template+software+development PDF link annotation
    • http://profyhouse.ru/balanced_body_reformer_iq2rv5q.pdfIn PDF document text
    • https://wobelafesuta.weebly.com/uploads/1/3/4/7/134767333/2506855.pdfIn PDF document text
    • https://walazufa.weebly.com/uploads/1/3/1/3/131383665/5244868.pdfIn PDF document text
    • http://fruittea.space/unicorn_free_icon_packehxin.pdfIn PDF document text
    • http://mybatut.store/27953090146ctmoj.pdfIn PDF document text
    • http://mapugukabazewu.scienceontheweb.net/atago_pocket_refractometer_coffee.pdfIn PDF document text
    • http://icub.tech/74409456798ndndp.pdfIn PDF document text
    • http://tapozifokun.mywebcommunity.org/40009212614.pdfIn PDF document text
    • http://niluwipewuxasa.medianewsonline.com/adding_and_subtracting_like_fractions_worksheets.pdfIn PDF document text
    • https://pakipuxis.weebly.com/uploads/1/3/5/3/135347710/9136394.pdfIn PDF document text
    • http://jigikujed.scienceontheweb.net/mcsa_certification_study_material.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lipabarud.atwebpages.com/boat_knot_tying_guide.pdfIn PDF document text
    • https://37976aa0-f55f-47d3-847a-8d185b13ebf6.filesusr.com/ugd/1d6212_e6e494af907342d19a4def6f65b03236.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tetenifeme/regulatory_reporting_jobs_in_charlotte_nc.pdfIn PDF document text
    • http://sifebitufol.onlinewebshop.net/pizodixabanonetosemewowig.pdfIn PDF document text
    • http://jokosen.atwebpages.com/69667901587.pdfIn PDF document text
    • https://d86ad34a-7df2-4f47-937b-a12ab5abc0fa.filesusr.com/ugd/8cbfce_8621576b6bcb437ab71b0f47b6bc563a.pdf?index=trueIn PDF document text
    • http://magegefopo.atwebpages.com/fiendish_codex_3.pdfIn PDF document text
    • http://nojikigor.myartsonline.com/boxodijutejedodagosaj.pdfIn PDF document text
    • https://93bb5028-8b17-4c47-8ab9-f46a024b0e86.filesusr.com/ugd/041612_174909d74d38438b849dd92199485d44.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kevava/22230018277.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED96 5348 bytes
SHA-256: 260ae8f87c775c51b36e87c5c71b210d4524d7b4706b3afc89b4e0ed513ff5da
font_01_sfnt_off0000ffbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFBF 2288 bytes
SHA-256: bbf4b8e885ee398376e9402571124dde44bdc4f3129679d227de4c7ad3570dfd
font_02_sfnt_off00010a05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A05 10988 bytes
SHA-256: 4eb06ee6dd1b964036937f004fff719dc866f30d34d4acb0d3394c244ba8a77c

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