Malicious PDF — malware analysis report

Static analysis result for SHA-256 08bfa2a53b8b8c18…

MALICIOUS

PDF

68.0 KB Created: 2021-06-13 16:43:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 6dac5832de92cd027bc33c79f7d3ef31 SHA-1: ab7e7873f4610b1b5ba415ac46c3bb9e14df4e01 SHA-256: 08bfa2a53b8b8c18d1cda9be4838a8fcaa94f004720eb1088e1f92467609dd2d
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting, and is flagged by ML classifiers and ClamAV as malicious phishing content. The document body, though heavily obfuscated, suggests a lure related to 'wedding card design online free editing', which is likely a pretext to direct users to malicious sites. No scripts were extracted, but the overall structure and heuristic firings indicate a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://archism.ru/pbw?utm_term=wedding+card+design+online+free+editing PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4417413/normal_602d89238243f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471238/normal_5ffd0c34790df.pdfIn PDF document text
    • https://wibarojadika.weebly.com/uploads/1/3/4/6/134689619/1463970.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444875/normal_5ff6716aa70e9.pdfIn PDF document text
    • https://zetolame.weebly.com/uploads/1/3/0/7/130775520/6335648.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5b2af2b-9995-44a6-bbf9-9fc89079cf6e/europa_baby_palisades_crib.pdfIn PDF document text
    • http://wotetidi.pbworks.com/f/52064238605.pdfIn PDF document text
    • http://ronuzexem.pbworks.com/w/file/fetch/144428010/como_dar_robux_en_roblox_a_amigos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9be0c6b8-76ce-4242-b636-37005f79e1de/21030605413.pdfIn PDF document text
    • http://buvavipoluvu.pbworks.com/f/fufiwilonijadujobijete.pdfIn PDF document text
    • http://wuwolufit.pbworks.com/f/79633033782.pdfIn PDF document text
    • http://siwuromo.pbworks.com/f/what_is_the_definition_of_retained_earnings_on_a_balance_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c77a8ec-6552-4200-880a-a24a09c98eeb/sudoxemelujikiluker.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3696dbd3-9109-4e3b-867d-01ee8431bf57/87734420527.pdfIn PDF document text
    • http://juwelite.pbworks.com/w/file/fetch/144541797/beyonce_22_day_nutrition.pdfIn PDF document text
    • http://wiliser.pbworks.com/f/46650328054.pdfIn PDF document text
    • http://feselikebapu.pbworks.com/w/file/fetch/144709431/how_to_download_microsoft_visual_basic_2010_express_for_free.pdfIn PDF document text
    • http://bokibagaror.pbworks.com/f/padi_recreational_dive_planner_metric.pdfIn PDF document text
    • http://jaxonewu.pbworks.com/f/86858874162.pdfIn PDF document text
    • http://pobepamuti.pbworks.com/w/file/fetch/144968745/rational_exponents_and_radicals_worksheet.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_off0000cf68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF68 5204 bytes
SHA-256: 64ab35d29ff93ba69612be5caf57e11e324ff22292df92f67011ad872030176c
font_01_sfnt_off0000e13a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE13A 9788 bytes
SHA-256: 41b5dd6076a33b676f3460f04bcdb05379f0df99bfe738e6c555e8df8411b771

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