Malicious PDF — malware analysis report

Static analysis result for SHA-256 523c4b09a045e9e2…

MALICIOUS

PDF

77.8 KB Created: 2021-04-02 07:04:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: ba309e2dd8010e8998aaa5459e3f8222 SHA-1: 0e26fe23dae5cf0d9d09c92a75e512442b0807a8 SHA-256: 523c4b09a045e9e2dded3ae8d8bad13c5b7152fcefaede5a124cad94997ac251
186 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially malicious content or phishing sites. The presence of URLs like 'https://soxebez.ru/123?utm_term=solo+jennie+video+song' and 'https://zovipimisog.weebly.com/uploads/1/3/1/1/131163747/ae41c60b292a2b.pdf' strongly suggests a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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://soxebez.ru/123?utm_term=solo+jennie+video+song PDF link annotation
    • https://zovipimisog.weebly.com/uploads/1/3/1/1/131163747/ae41c60b292a2b.pdfIn PDF document text
    • https://wiworixoso.weebly.com/uploads/1/3/4/3/134321663/d6acb3e27cf810.pdfIn PDF document text
    • http://scrlt.xyz/jezojemek9a7.pdfIn PDF document text
    • https://vadezewojig.weebly.com/uploads/1/3/1/3/131379553/xevumefote.pdfIn PDF document text
    • http://deutschebank-meine.com/surviving_mars_researchsdqw5.pdfIn PDF document text
    • https://toxutumopomepe.weebly.com/uploads/1/3/5/3/135327812/dafezaf_fenuvidizafima_xowukema_xakatog.pdfIn PDF document text
    • https://vebuleme.weebly.com/uploads/1/3/4/3/134321641/zupiredeluwo-rivelu.pdfIn PDF document text
    • http://italiabeach.space/538426137815klos.pdfIn PDF document text
    • http://podarokinsta.site/sazuneweduj5und.pdfIn PDF document text
    • https://witaretazijaw.weebly.com/uploads/1/3/0/8/130813730/700f48a733.pdfIn PDF document text
    • http://wirelessinfo.ru/original_american_cookery_book860tt.pdfIn PDF document text
    • https://gepidoduxaw.weebly.com/uploads/1/3/5/3/135324144/7249781.pdfIn PDF document text
    • https://sazaxadapu.weebly.com/uploads/1/3/4/3/134330736/webanoginagu-gikuvapigirup-kanopepe.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/saziwijaxodav/sec_halftime_report_announcers.pdfIn PDF document text
    • http://rijujala.epizy.com/brainstorming_web_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/fejififimaketo/retivemibaxabodumonulas.pdfIn PDF document text
    • http://ninanupazazudad.rf.gd/63725831325.pdfIn PDF document text
    • https://s3.amazonaws.com/kufazete/miwixibepi.pdfIn PDF document text
    • http://tojegazanet.rf.gd/traductor_google_espaol_portugues_portugal.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_off0000f372.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF372 4928 bytes
SHA-256: b9922e6bfd1a4d4983713495ad3ed37f9eeda179d7af86d3cbdcd7e2da001372
font_01_sfnt_off00010453.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10453 11208 bytes
SHA-256: 67b189956c2b721eec55ca0803af066edead7710e833069dda84f60f66507844

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