Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6e092b2df414604…

MALICIOUS

PDF

80.2 KB Created: 2021-03-08 11:52:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 6633566cdb51514f6ad77efe37989b82 SHA-1: 5b59c83ef32823f50dffeab4117ea3c414dea05f SHA-256: a6e092b2df4146048598933b4f0029f8f83e5cd2c24eb8f47a087170002526df
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9994

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://vilenefex.ru/123?utm_term=comments+for+high+school+report+cards+english PDF link annotation
    • https://memibufosigi.weebly.com/uploads/1/3/1/3/131383384/4613935.pdfIn PDF document text
    • https://wovupidej.weebly.com/uploads/1/3/4/6/134687137/rilez.pdfIn PDF document text
    • http://eslife.pro/xeguneroku1kvsg.pdfIn PDF document text
    • https://fafuluzugow.weebly.com/uploads/1/3/1/4/131453648/5a4e65c0.pdfIn PDF document text
    • http://banki-internetowe.com/sheep_in_a_jeep_free_activitiesivljd.pdfIn PDF document text
    • http://gouliwer.online/what_time_management_strategies_have_worked_well_for_you_in_the_past8ktrz.pdfIn PDF document text
    • http://moitender.org/cloudformation_template_yaml_to_json93iam.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446045/normal_5fc72a99d9753.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368740/normal_6026b1b1c5ec9.pdfIn PDF document text
    • http://barcaporirternet-interbank-pe.com/158564926837dv9m.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387412/normal_600128082acc7.pdfIn PDF document text
    • https://lezanixopedem.weebly.com/uploads/1/3/4/8/134886347/156922.pdfIn PDF document text
    • http://buloshnaya.site/que_es_una_base_en_quimica7r7sd.pdfIn PDF document text
    • https://tifopenowotak.weebly.com/uploads/1/3/4/4/134480635/4693ae8c39ca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369164/normal_600fea69aa607.pdfIn PDF document text
    • http://instapriz.site/tarzan_man_of_the_apes_movievj2k9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sonedef.epizy.com/dalazalife.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09e904aa-922f-4fff-bf9d-464c32334f2c/push_sapphire_online_book_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9155bc60-4b10-4198-aa52-c637b53ad41e/50429864217.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b24977d6-3207-4a13-9c10-f414a7e1013d/67981856069.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ff8b90e-e649-421e-a92b-d161361b953c/fobudibuxidu.pdfIn PDF document text
    • http://pokitudid.epizy.com/6133708010.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9cccac1d-32a6-4e02-9888-5b18942659b8/powokilut.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_off0000fde3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDE3 5476 bytes
SHA-256: 70f25f89df27b77c1149774c30f890d4d65f8daa8b89ce89dcd7b41fcd07675e
font_01_sfnt_off00011052.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11052 10304 bytes
SHA-256: 66eca557c6bdb07fa58c775eecdd89fd561353648ed028ea8ec0eafc27025204

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