Malicious PDF — malware analysis report

Static analysis result for SHA-256 71c75010fdecca71…

MALICIOUS

PDF

86.5 KB Created: 2021-09-19 08:08:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 8e335b5fae00a16a6af6d34376a10e1c SHA-1: fca2a1d17e62d20d61a5306034411f3e1d9d2b43 SHA-256: 71c75010fdecca711c1b29583ce3d939b55d7c1d9009d606c32a339a2da0d958
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which are hosted on potentially compromised or malicious domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded links are consistent with techniques used to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9940

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 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://rpsbchamber.org/editorData/file/xifedazotusevagoduma.pdf In PDF document text
    • http://icltindia.in/userfiles/file/xologutexadu.pdfIn PDF document text
    • https://qeyeoptical.com/ckeditor/ckfinder/userfiles/files/29641393626.pdfIn PDF document text
    • https://sesconbs.org.br/ckfinder/userfiles/files/18126972797.pdfIn PDF document text
    • https://unitedfightalliance.jordanadams.com/ckfinder/userfiles/files/52966408710.pdfIn PDF document text
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/1612f395182c85---10576423738.pdfIn PDF document text
    • http://jagatjyotischool.org/jagatjyotischool/userfiles/file/96197816318.pdfIn PDF document text
    • http://najlepsietorty.sk/uploads/fck/file/42286515397.pdfIn PDF document text
    • https://foundryindia.org/userfiles/file/vaxagubumokixujajef.pdfIn PDF document text
    • https://casabresciani.it/uploads/file/pesoferegujesawef.pdfIn PDF document text
    • http://rem-proekt.com/f/file/99587421506.pdfIn PDF document text
    • http://tinhdauvietnam.vn/upload/files/zofigit.pdfIn PDF document text
    • https://tuvanthietke13-5.com/webroot/img/files/56773472627.pdfIn PDF document text
    • http://thanhcongtechtra.com/upload/files/50200386361.pdfIn PDF document text
    • https://rockeit.com/userfiles/file/fevitifepodidolojojad.pdfIn PDF document text
    • https://aannemingsbedrijfbarthulsbosch.nl/userfiles/file/mobuterasimi.pdfIn PDF document text
    • https://dildendilecevirievi.com/upload/ckfinder/files/74562512688.pdfIn PDF document text
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bd7937050f---43001865168.pdfIn PDF document text
    • https://wendi101.com/userfiles/file/75559704035.pdfIn PDF document text
    • https://ikorti-iao.com/userfiles/files/11670958506.pdfIn PDF document text
    • https://gulfcans.com/home/madarmun/public_html/gulfcans/images/bulk_images/files/19835263985.pdfIn PDF document text
    • http://akkoryazilim.com/userfiles/file/73781634743.pdfIn PDF document text
    • https://lifecareproduct.in/ckfinder/userfiles/files/sazevegoxividuzomezuziji.pdfIn PDF document text
    • https://panegovernance.com/ourprojects/chowki/UserFiles/file/bogotolelaxukujazefonuwon.pdfIn PDF document text
    • http://toitureetfacade.fr/data/Files/98130214510.pdfIn PDF document text
    • https://china-glass-mosaic.vegner.com/userfiles/files/20210912_022322.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=live+boxing+tonight+stream+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_off0000e969.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE969 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010180.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10180 10880 bytes
SHA-256: 49c5e2874f7ce04350c7b819c9c49ac97cb58cb06e12c0adfad36ea85162416b
font_02_sfnt_off00011a87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A87 18916 bytes
SHA-256: 33628aadce54ef86f6e678334e10b812e0816af9849154a034603702a9142d61