Malicious PDF — malware analysis report

Static analysis result for SHA-256 f67ff765eeac232b…

MALICIOUS

PDF

75.7 KB Created: 2021-03-19 20:46:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: ecde4e9b9e0ed1c4bc4654205573f22b SHA-1: daf77cb7bfa511a757f1b917a059127d6050c47a SHA-256: f67ff765eeac232b655586c4c4a8cec09c83971cc317b5cfe51966eae7d0c38b
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 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://jacksth.ru/wix?keyword=apk+real+clash+royale+mod PDF link annotation
    • https://cdn.sqhk.co/jawuraxexije/haeJJmO/28143843022.pdfIn PDF document text
    • https://boxenujevodaziw.weebly.com/uploads/1/3/1/0/131070305/7afe6.pdfIn PDF document text
    • https://cdn.sqhk.co/gixelotopa/zehjieE/rudipijigunole.pdfIn PDF document text
    • http://vashmaster.info/the_boy_in_striped_pyjamas_film_analysisesy1m.pdfIn PDF document text
    • https://cdn.sqhk.co/gebunemif/horgigd/best_tags_for_minecraft_youtube_videos_2020.pdfIn PDF document text
    • https://lukawonudos.weebly.com/uploads/1/3/5/3/135320707/8948595.pdfIn PDF document text
    • http://reggis.info/gajinavibufajuzquam.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/29312773-9270-4f9c-91e8-8e6f378a20b6/nuwitovuxubixitejepuge.pdfIn PDF document text
    • https://0eb00d84-361a-45dc-b346-1af5c8eb785c.filesusr.com/ugd/d79848_1b2793f8b5cc488d9c46c507cc247c4b.pdf?index=trueIn PDF document text
    • https://3ecb585b-79b8-4502-8567-d9a17299c5c1.filesusr.com/ugd/4b874d_b6ebe7dcfc594a3fbcc6aa3b8ea5792d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed6554a7-3470-42d3-98c9-dc6e7188d0d3/wimobujetizu.pdfIn PDF document text
    • https://8f20b4bd-83f7-4a55-8c6f-e9501e2e061c.filesusr.com/ugd/c1c462_332d34c2a4d84396848e5bed2a51aef9.pdf?index=trueIn PDF document text
    • https://d1ee23ee-9ccf-45b0-80ef-1e1ff1f657c4.filesusr.com/ugd/9ef0c3_29a7481f7fc24a8a8f8c8ebdbc42c814.pdf?index=trueIn PDF document text
    • https://d6b7b3c7-8429-4d82-9d75-5d5d09e763cc.filesusr.com/ugd/a8c229_0c312b9925844a0281429aa244d53289.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pilazi/mejabetodadimedezegumiwab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b6727d1-6f69-401f-bcd3-d0d085ed48d0/xisolumi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7212c568-f47a-4d75-af94-397f70d2e45d/8295940082.pdfIn PDF document text
    • https://s3.amazonaws.com/juzewojavomofew/1015234923.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/639d0f78-e659-4459-9332-e1eee2cec93c/jimemumokemagapobikine.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_off0000eb73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB73 5468 bytes
SHA-256: 8267b27d0a240059508d098ec8740ccb2e2be5ad14f69cc5ad3ee6e22712b3ca
font_01_sfnt_off0000fde7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDE7 10380 bytes
SHA-256: e86eca8cf0711dc9bf16add33870ac5e43465a6476aaf82404f90a7d8237a734

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