Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a614e55ab65a0f7…

MALICIOUS

PDF

75.3 KB Created: 2021-02-17 00:11:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: e90badf7e2990bd074278b7c25f2c272 SHA-1: a1b6488aa808c9f0519195cb6d400b1c4a487593 SHA-256: 8a614e55ab65a0f7dad0071a44f3bf828b94d2dde9eea273e7fe789a40967f7c
156 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 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 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.
  • 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/strik?utm_term=how+to+write+an+irish+letter PDF link annotation
    • http://onsideball.info/66735455414pbaj5.pdfIn PDF document text
    • https://cdn.sqhk.co/nexetifosam/XJggHvu/vsco_lightroom_presets_2020.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368972/normal_5fe4816a6568f.pdfIn PDF document text
    • https://cdn.sqhk.co/levuzivanu/C1QV0ie/16188781885.pdfIn PDF document text
    • https://cdn.sqhk.co/nobixapo/giiejfh/87424650002.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453134/normal_60208e36063d2.pdfIn PDF document text
    • http://hayatevesigar.online/alvaston_infants_school_uniformhrufe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453333/normal_5fde66e0e2f25.pdfIn PDF document text
    • http://nout-prokat.website/17745657850ktij9.pdfIn PDF document text
    • http://mesretly.xyz/kibevatenovevosetowbaxff.pdfIn PDF document text
    • http://vir-tus.com/14433746049kwnrs.pdfIn PDF document text
    • https://pelozaxuji.weebly.com/uploads/1/3/2/6/132680784/tewireseturo_wakunifug_saparos.pdfIn PDF document text
    • http://hookup756.fun/apa_case_study_analysis_formatlg3hn.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454041/normal_5fdbe56062e91.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nefunupu/centre_de_formation_agricole_montreal.pdfIn PDF document text
    • https://s3.amazonaws.com/widiku/62064566247.pdfIn PDF document text
    • https://s3.amazonaws.com/rubidokezive/wixazesusadubez.pdfIn PDF document text
    • https://s3.amazonaws.com/bepukuba/cb_bike_png.pdfIn PDF document text
    • https://s3.amazonaws.com/wavunot/66235086801.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_off0000ea67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA67 4828 bytes
SHA-256: e4e71a08189b612d515a899b839897b5594721d7c1c9894338c22d54c471e69f
font_01_sfnt_off0000fad5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAD5 10908 bytes
SHA-256: 477f1b119cb948b2dbafd0dceb2665678707f6e5ca1f546ddd86c44caad67ea5

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