Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d9661505f7c2f76…

MALICIOUS

PDF

78.7 KB Created: 2021-05-24 23:18:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 034f42b0bc02959b54ac66532e97e5ab SHA-1: deea3f31c5441832fb4f8738f00d8669afa37a49 SHA-256: 5d9661505f7c2f76749d485f2ebf066e6476cb48ee9010eb13f6a0dc8fae733c
196 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many of which appear to be part of an SEO link farm designed to redirect users to potentially malicious sites, such as the identified redirector at 'https://resalured.ru/strik?utm_term=questions+for+mis+interview'. The document body, though heavily obfuscated, suggests a lure related to interview questions, aligning with phishing tactics.

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://resalured.ru/strik?utm_term=questions+for+mis+interview PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4445531/normal_601df7146719d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500447/normal_606a0b255ac57.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369900/normal_6057b1c28c279.pdfIn PDF document text
    • https://s3.amazonaws.com/juwofuxufijup/kitchenaid_superba_gas_convection_oven_manual.pdfIn PDF document text
    • https://rolosakuzorega.weebly.com/uploads/1/3/1/3/131379035/konotenopi_tomipagefazetik_pafof.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376874/normal_6009bc8c5b9a5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375694/normal_5ff3d1502ffff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417998/normal_6062c5ab775bf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374517/normal_60504756321a7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420431/normal_600528cedb9b5.pdfIn PDF document text
    • https://s3.amazonaws.com/fedufiporara/logitech_k400_plus_mac_driver.pdfIn PDF document text
    • https://s3.amazonaws.com/desekusoxi/developing_the_leader_within_you_2.0_chapter_1_summary.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461761/normal_6024aca20c8e0.pdfIn PDF document text
    • https://xefafarorul.weebly.com/uploads/1/3/4/6/134698093/babodo_norebiduto_naxov_sebinu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417308/normal_5fd3d05c6d4d2.pdfIn PDF document text
    • https://s3.amazonaws.com/jodabiladezot/accounting_for_dummies.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447641/normal_600a50d79d0a2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462350/normal_6005c9193613f.pdfIn PDF document text
    • https://s3.amazonaws.com/purufiz/netflix_app_free_for_windows.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000f9e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9E5 4884 bytes
SHA-256: b78a1b6f6b1d61256b6e0a26987750e641b7d4f387ddfd3de2a0fbe20dcc53dc
font_01_sfnt_off00010a89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A89 10288 bytes
SHA-256: 8742beeb9fb960d527787e6293f72cfdcb3efd2960d994f29e5a5fd97a05cebd