Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec705a8f9b06c02f…

MALICIOUS

PDF

83.6 KB Created: 2021-05-04 02:48:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: f194cb6db85e4f936635e8310d78c718 SHA-1: b008b1dc91b136693cc951e24225deff5135643e SHA-256: ec705a8f9b06c02f9a628ef251c21a5d33f8cff757a4c3d7c9dcd4864f168f88
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=voyager+legend+uc+b235-m PDF link annotation
    • http://autoport76.online/139753139966of89.pdfIn PDF document text
    • http://reactivaperu-2020.com/47720312737oirii.pdfIn PDF document text
    • https://cdn.sqhk.co/fopeziriga/Igeqfgg/8077107147.pdfIn PDF document text
    • http://thecet.xyz/fafedemezesuzuxh8gtv.pdfIn PDF document text
    • http://ledimpress.biz/the_cultured_pearl_opentable9jbfr.pdfIn PDF document text
    • https://cdn.sqhk.co/rodofusavivi/pH0geAb/davisobapamaborezotix.pdfIn PDF document text
    • http://lamovingcompany.com/world_empire_2027_pct8ss8.pdfIn PDF document text
    • https://cdn.sqhk.co/letinumi/7DCkv4d/mars_retrograde_2020_effects.pdfIn PDF document text
    • https://cdn.sqhk.co/guwaloxipete/ghmjeie/23977973861.pdfIn PDF document text
    • https://cdn.sqhk.co/ladetozuxi/YI1jiig/edulastic_math_answers.pdfIn PDF document text
    • http://sovetnik53.ru/minn_kota_power_drive_v2_i_pilot_reviewfeiwd.pdfIn PDF document text
    • http://mixit.info/78620061381459ty.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://topagujowulefe.epizy.com/67971701744.pdfIn PDF document text
    • https://s3.amazonaws.com/garorowa/california_general_acknowledgement_form_notary.pdfIn PDF document text
    • http://gajefeni.rf.gd/kipakakosuganopuvutojif.pdfIn PDF document text
    • http://xosekube.epizy.com/sotuxofomebita.pdfIn PDF document text
    • http://gurifituzegotu.rf.gd/penena.pdfIn PDF document text
    • https://s3.amazonaws.com/vesubodufisi/video_editor_apk_android_2._3.pdfIn PDF document text
    • http://gujalitez.epizy.com/iris_statspin_express_2_service_manual.pdfIn PDF document text
    • http://wonenuw.epizy.com/24791282978.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f8e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8E2 5740 bytes
SHA-256: 71b28f35b2f2888bf0645b24e51e38146db4865108f1321dd319f835b2631f55
font_01_sfnt_off00010c6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C6F 16304 bytes
SHA-256: 30e96d645efb2617ae4bca1d392e06192eb5d5c9136ce0ce75b21420957d85db

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