Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b82c5375072667d…

MALICIOUS

PDF

76.2 KB Created: 2021-03-16 21:05:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: a83b2e025bc166cf0254fb845abe444f SHA-1: b4566c0acafe362d243a1ed6ffe07b5263ccefc5 SHA-256: 1b82c5375072667de9206ce738f656ae81e88f1097b1a290eb35bbbda0c5ed2d
156 Risk Score

Malware Insights

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

The PDF contains an embedded URL that redirects to a suspicious domain, masquerading as content related to 'Assassin's Creed Odyssey'. Heuristics indicate a link farm and ML classification strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to a compromised or malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://xezojetit.ru/strik?utm_term=assassin%2527s+creed+odyssey+dialogue+options+symbols PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4414677/normal_601e5f14ef872.pdfIn PDF document text
    • https://dujakoxuk.weebly.com/uploads/1/3/1/4/131483447/degos-lolubezo.pdfIn PDF document text
    • https://jaroxifapo.weebly.com/uploads/1/3/1/6/131636664/9bb7076c3a6c47.pdfIn PDF document text
    • http://blockingscenery.com/how_to_replace_sony_mdr_7506_ear_padsmx6nv.pdfIn PDF document text
    • https://cdn.sqhk.co/dabigewom/cheidji/followers_up_with_perfect_caption_mod_apk.pdfIn PDF document text
    • http://naturfresh.space/popular_ringtones_2019_download_mp3_tamiltw04a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373261/normal_5ff8af4f44715.pdfIn PDF document text
    • http://idem-peshkom.ru/67749649593tjm4h.pdfIn PDF document text
    • http://promoocaoameericanas.com/11154435747xoqrq.pdfIn PDF document text
    • https://joxunirefebemi.weebly.com/uploads/1/3/4/3/134319414/f3ae66334.pdfIn PDF document text
    • https://gisogademumes.weebly.com/uploads/1/3/1/3/131379615/4944159.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413374/normal_5feafcb02e5e2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454052/normal_5ff36535376af.pdfIn PDF document text
    • https://lidelituni.weebly.com/uploads/1/3/1/4/131452972/5e90df428.pdfIn PDF document text
    • https://cdn.sqhk.co/sirepajaku/Theiilu/nomavuwon.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/ximupuv/zusububesuzusujepotu.pdfIn PDF document text
    • https://s3.amazonaws.com/gixawetopoli/ajax_submit_form_after_validation.pdfIn PDF document text
    • https://s3.amazonaws.com/jitimesolagun/nesewodusipiwo.pdfIn PDF document text
    • https://s3.amazonaws.com/zesotat/wogiroxurabunuvob.pdfIn PDF document text
    • https://s3.amazonaws.com/gekixadonuru/dukosefevud.pdfIn PDF document text
    • https://s3.amazonaws.com/vapite/income_guidelines_for_section_8_in_nj.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_off0000ed0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED0F 5660 bytes
SHA-256: 579a5a6f0689337081caf68b545d46c81134cf741079f0f55243428650c61f50
font_01_sfnt_off0001004f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1004F 10272 bytes
SHA-256: 88e5667222b94d0b410dad728276928e1911889e444f90821a68507abacf4fee

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