Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa6964e34e6ff639…

MALICIOUS

PDF

77.4 KB Created: 2021-02-26 15:40:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: e0115514e30b16802360e66b189bb0ce SHA-1: b3b05437876addeb9d50f8527118b9b6cfd9b1d9 SHA-256: fa6964e34e6ff639843c3c563b17493c179e121ad7408fe4a12e0e42450f51c8
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for SEO poisoning and phishing. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://vilenefex.ru/strik?utm_term=oxford+picture+dictionary+english+spanish PDF link annotation
    • https://wafulezejo.weebly.com/uploads/1/3/4/7/134748518/lefure-penitumesilo-nimejagenopitej.pdfIn PDF document text
    • https://zisusanizapan.weebly.com/uploads/1/3/0/7/130775047/wogezuvolal.pdfIn PDF document text
    • https://rukifutotusiz.weebly.com/uploads/1/3/4/6/134685592/2622896.pdfIn PDF document text
    • http://dalkomis.website/sharp_microwave_oven_drawer_smd2470asosfci.pdfIn PDF document text
    • http://perevod-card2card24.site/10905417642zcx3c.pdfIn PDF document text
    • http://prizinsta.online/marvel_future_fight_quicksilver_guidev2g9e.pdfIn PDF document text
    • http://qqkaxes.xyz/lepexozls73.pdfIn PDF document text
    • http://generalmassage.online/wizz_air_stockholm_tuzlamw11p.pdfIn PDF document text
    • http://verifybadgesbusiness.com/mobile_soccer_league_mod_apk_terbaruo700q.pdfIn PDF document text
    • https://migigagabigugam.weebly.com/uploads/1/3/0/7/130775968/3189124.pdfIn PDF document text
    • http://warowusavi.mywebcommunity.org/balancing_chemical_equations_worksheet_grade_10_cbse.pdfIn PDF document text
    • http://edevletorg.com/personal_board_of_directors_templatev9hek.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/bidurudilidujug/myspanishlab_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/vaxebisapesi/blue_eyes_technology_journals.pdfIn PDF document text
    • https://s3.amazonaws.com/fezenur/giruwagirikekitasu.pdfIn PDF document text
    • https://s3.amazonaws.com/lolijexejomak/hey_jude_beginner_piano_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/baxadelefofibuz/tiwadenujosenoloxuzinawe.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_off0000eee9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEE9 5616 bytes
SHA-256: f0800048d6649d9b6bef6cce0eed505f65565ea4c8822431f8adc5f2bc482e3c
font_01_sfnt_off00010213.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10213 11300 bytes
SHA-256: 92b01ca634c342558b601cbc631e30bdfc63d6af7ce844e785c8ea011116c4d7

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