Malicious PDF — malware analysis report

Static analysis result for SHA-256 897be4250bb8ff94…

MALICIOUS

PDF

76.5 KB Created: 2021-02-16 07:45:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 1c4dc11afb3770f295baa05a6be5d38c SHA-1: 9c6a9814bef50b7ba12ff7f78b7194973962bbf1 SHA-256: 897be4250bb8ff94749ed3de8bcf41765b2d4e9729eb4d81bd47253f597d8010
184 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, and contains multiple embedded links pointing to potentially malicious redirectors. The document body, though heavily obfuscated, contains text related to 'The Sims Free Play' and 'wkhtmltopdf', suggesting a lure for users seeking game-related content. The embedded links, such as https://yafferge.ru/wix?keyword=the+sims+free+play+guide, are designed to redirect users to malicious infrastructure.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/wix?keyword=the+sims+free+play+guide In PDF document text
    • https://wavopotajulaja.weebly.com/uploads/1/3/4/6/134631105/rekusuzepebiga.pdfIn PDF document text
    • https://lezanixopedem.weebly.com/uploads/1/3/4/8/134886347/7194999.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412902/normal_5fc6485b4b2e4.pdfIn PDF document text
    • http://alteramaks.world/89563755596urrvh.pdfIn PDF document text
    • http://wajufogisabo.iblogger.org/adobe_lightroom_cinematic_presets_free.pdfIn PDF document text
    • http://all-host.site/acanthamoeba_sppty0fz.pdfIn PDF document text
    • http://thrivewebs.com/shopee_apk_iosbtmx3.pdfIn PDF document text
    • http://dopelozaf.22web.org/amines_chapter_class_12.pdfIn PDF document text
    • https://bugojexipu.weebly.com/uploads/1/3/1/3/131398417/ginexirubazelifini.pdfIn PDF document text
    • http://frankiearvelo.com/toolwiz_photos_pro_editor_for_pcbvi9p.pdfIn PDF document text
    • http://summ-green.fun/axis_221_network_camera_manual3nmqp.pdfIn PDF document text
    • http://rusherx.studio/nudadejapadirafecwsjy.pdfIn PDF document text
    • https://pobufulali.weebly.com/uploads/1/3/4/4/134494274/7583bc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/putelekireza/meditation_music_piano_sheet.pdfIn PDF document text
    • http://miduzusajaveg.rf.gd/filter_multiple_columns_in_google_sheets.pdfIn PDF document text
    • http://jiwoxofor.rf.gd/53218865345.pdfIn PDF document text
    • http://sokozujetabil.rf.gd/57987458992.pdfIn PDF document text
    • https://s3.amazonaws.com/wekibik/mockup_business_card_psd.pdfIn PDF document text
    • https://s3.amazonaws.com/gixirojozogufux/missha_bb_cream_color_guide.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_off0000e2d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2D6 5092 bytes
SHA-256: bb255d4504d4f5be33dee21da3f165670ee3b07f519f70b949be7913ec7ab3c6
font_01_sfnt_off0000f421.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF421 9996 bytes
SHA-256: af5940c7042fc7fe10eec4694138f8b80d61233a27975c6191ecfb6702079ec6
font_02_sfnt_off0001165a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1165A 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176