Malicious PDF — malware analysis report

Static analysis result for SHA-256 89a09f34eed4ec70…

MALICIOUS

PDF

69.1 KB Created: 2021-09-17 12:50:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 4d7c2efb54172b8f9ffa3b828bcf3002 SHA-1: 0ebb74f72edea73020aed82f85dc276679a424e5 SHA-256: 89a09f34eed4ec7044a961f6dab996fa7bed7fc2261ac311ecfef69ce50c019e
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as an image-only lure, typical for phishing campaigns, containing numerous external links to potentially malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to a malicious payload or phishing page, likely initiated by a user click.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 69 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://pistant.ru/uplcv?utm_term=wtv+apk+download PDF link annotation
    • https://alev.az/userfiles/file/xezotikafitulu.pdfIn PDF document text
    • https://cleanenergy.mn/uploads/files/lujawoxibuwugexelonukom.pdfIn PDF document text
    • https://esprimagroup.com/userfiles/file/78837069805.pdfIn PDF document text
    • http://vet-arrighicolangelicristilli.eu/userfiles/files/pomexonulajowu.pdfIn PDF document text
    • http://drivingschool-brno.eu/files/xukufijuniwalejibekit.pdfIn PDF document text
    • https://hbphoto.ca/resimler/files/76223470978.pdfIn PDF document text
    • https://stdtekstil.com/upload/ckfinder/files/88321827813.pdfIn PDF document text
    • http://tizianaiberti.it/userfiles/files/rodopaw.pdfIn PDF document text
    • http://pol2-simf.ru/userfiles/file/28792168254.pdfIn PDF document text
    • http://tubemakingmachine.com/uploadfile/files/76628506807.pdfIn PDF document text
    • https://szalkasszorutacskok.hu/app/webroot/files/content/files/virojagimowe.pdfIn PDF document text
    • https://melnikhouse.com/userfiles/file/nepobebizir.pdfIn PDF document text
    • https://almuhja.net/ckfinder/userfiles/files/wekodoputorodo.pdfIn PDF document text
    • http://cjmfgxfollow.morefriendship.com/upload/files/45240661913.pdfIn PDF document text
    • https://crmsaas.dswip.com/ci/userfiles/files/nulozonosomodivaxevirugu.pdfIn PDF document text
    • http://svaz-podnikani.cz/files/file/19938991900.pdfIn PDF document text
    • http://iproperty.ae/userfiles/file/21386399417.pdfIn PDF document text
    • https://immo-cjeanpaul.lu/userfiles/files/logako.pdfIn PDF document text
    • https://ww150005.linebot.net/upfile/files/20210903104916.pdfIn PDF document text
    • http://rhondadejean.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/dawewarulozulorusuzub.pdfIn PDF document text
    • http://www.sindafaz.com.br/admin/editor/ckfinder/userfiles/files/wezuwat.pdfIn PDF document text
    • http://videocycling.info/files/file/94334305097.pdfIn PDF document text
    • http://easyreturn.store/userfiles/file/xasuguved.pdfIn PDF document text
    • http://sarljarry.com/userfiles/file/zanikaxelarazif.pdfIn PDF document text
    • http://thesprotia.gr/uploads/file/75926504319.pdfIn PDF document text
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/2068f1afcd1c32a1bcb6d795b9cb3d1b/96899200707.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b43f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB43F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cc51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC51 14360 bytes
SHA-256: df6aab8635ec89e63e715bf2873030d9ca769d7cc40ec2c15bce8ea9031dc0d3
font_02_sfnt_off0000f01a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF01A 10128 bytes
SHA-256: 0acd981499eb97dc9fb41c5debafa84a1931e93306a6be501aee1e139ca1d773