Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3f1026a7c2f4fcb…

MALICIOUS

PDF

67.1 KB Created: 2021-10-01 14:55:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: bdfa5a44f495a1fb9a5f3b4feeafef20 SHA-1: 1c5a693d0d4ef7757f36891b2fc8aa05caf0410d SHA-256: b3f1026a7c2f4fcb7a56a5cef38302f1ac10ef29aa167d2758498241385eec3e
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF exhibits characteristics of a phishing lure, including being image-heavy with minimal text and containing numerous external links. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of multiple unknown URLs suggests a potential redirection chain or a link farm designed to obscure the final malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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 67 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 http://www.szphotar.com/admin/img/files/14438857604.pdf In PDF document text
    • https://ppuhperspektywa.pl/files/edytor/file/limakogevifejipuzig.pdfIn PDF document text
    • https://sakura-bashi.com/uploads/files/202109022133061146.pdfIn PDF document text
    • http://giprozdraw.ru/ckfinder/userfiles/files/veledubifogitugela.pdfIn PDF document text
    • http://bjxbw.cn/userfiles/file/weregatem.pdfIn PDF document text
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/diuu99b1drgv3kp0tuvk1gshqc/lotodani.pdfIn PDF document text
    • https://mumegram.com/userfiles/file/40543754486.pdfIn PDF document text
    • https://shreenatharcade.com/userfiles/file/59703745124.pdfIn PDF document text
    • http://www.look4job.gr/images/_user_na/file/455068440.pdfIn PDF document text
    • http://dasbluemchen.com/52428170762.pdfIn PDF document text
    • https://elmaga.lt/components/com_mijoshop/opencart/image/data/files/burovufilumuvejofasa.pdfIn PDF document text
    • http://systempro.kr/userData/board/file/19109833749.pdfIn PDF document text
    • https://99shayari.in/userfiles/files/80912545568.pdfIn PDF document text
    • http://anabakorea.jp/userfiles/file/65167812757.pdfIn PDF document text
    • http://world-housing.jp/ckfinder/userfiles/files/mewuxaridufemapejipoji.pdfIn PDF document text
    • https://svenjakretschmer.com/ckfinder/userfiles/files/nawopubev.pdfIn PDF document text
    • http://prime-standard.com/piceditor/file/39519219587.pdfIn PDF document text
    • http://clarksville.net/wysiwygfiles/file/rutefeb.pdfIn PDF document text
    • https://ms1oke.com/contents/files/mazano.pdfIn PDF document text
    • http://kovacsoltvaskerites.hu/images/file/15143611875.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/161511ab3b3095---55451183278.pdfIn PDF document text
    • https://marblo.com/app/webroot/img/files/jidufesadu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=fnaf+ultimate+custom+night+freePDF link annotation
    • 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_off0000ac4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC4F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c466.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC466 10860 bytes
SHA-256: 6f36365424630ae75be8f26eb4ed8a65fde683e6def052f046c58edc17261920
font_02_sfnt_off0000dd47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD47 13808 bytes
SHA-256: 4522a88dc87d6f4a1fb3836bf0e2b572a90c758e2d4813c07141d1c79aabc349

Open this report in the interactive analyzer, or submit your own file for analysis.