Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cd268ba2cf3e84f…

MALICIOUS

PDF

66.8 KB Created: 2021-02-23 00:57:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: b79d59025fd783f66fe01697f5ad4a7a SHA-1: 493311cfe28736aa82ecd9a62ec7d19b31c3996b SHA-256: 3cd268ba2cf3e84f361a96ac72b756889012975a32758571a78b289ff763f157
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, many pointing to disposable domains and hosted on potentially malicious infrastructure, indicating a link farm or phishing lure. The ClamAV detection and ML classifier strongly suggest malicious intent, likely to redirect users to sites hosting malware or phishing content. The document body, though heavily obfuscated, appears to contain search-related keywords, reinforcing the lure of a search result.

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://bologen.ru/wix?keyword=corel+paintshop+pro+x9+manual PDF link annotation
    • http://usersdeviceprotectionservice.site/45194219319nijzr.pdfIn PDF document text
    • https://jinuwipalo.weebly.com/uploads/1/3/5/3/135332432/6037651.pdfIn PDF document text
    • http://brettlockhart.com/22471224676ef9m1.pdfIn PDF document text
    • https://cdn.sqhk.co/wemowubire/FNgi76K/iphone_theme_for_oneplus_6t.pdfIn PDF document text
    • https://cdn.sqhk.co/naziwixolagu/gdiizmG/11822592975.pdfIn PDF document text
    • https://nakefofomiruni.weebly.com/uploads/1/3/4/4/134483242/fiributad-tarinabedo.pdfIn PDF document text
    • https://cdn.sqhk.co/tenalewi/AjjQhbM/car_accident_deaths_2019_worldwide.pdfIn PDF document text
    • https://cdn.sqhk.co/pigajifaw/fHv4hAG/williams_pinball_classics_xbox_360_download.pdfIn PDF document text
    • http://runmasten.online/pasozagamalufodexixezewbo4q.pdfIn PDF document text
    • http://rezotu.xyz/xenutodemimimafeqiycc.pdfIn PDF document text
    • http://50off.pro/88184027284ul1e1.pdfIn PDF document text
    • http://huseyincanx.com/40464973307m4jes.pdfIn PDF document text
    • https://cdn.sqhk.co/xubupigegi/i5kChd9/directv_customer_service_phone_number_please.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dagasopones/21770324177.pdfIn PDF document text
    • https://s3.amazonaws.com/devuxuzejozam/assam_bodoland_lottery_result.pdfIn PDF document text
    • https://s3.amazonaws.com/xuvamuba/falanujesakopuzot.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c3b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3B5 1584 bytes
SHA-256: 7652a6638dfdc054fc2814e19b58f5803a6ba636aa8df9679524c2d79c9f0c71
font_01_sfnt_off0000cbbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBBD 5188 bytes
SHA-256: a910310b8dfc71246a7225fbd17d756d3856851c5b3183c051d1d0635ea0f8f8
font_02_sfnt_off0000dd2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD2F 9608 bytes
SHA-256: b9effb04bec89f06aad27af8b7a03db490ebffe317e934140778159546a49b49

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