Malicious PDF — malware analysis report

Static analysis result for SHA-256 65333a627340fafc…

MALICIOUS

PDF

86.4 KB Created: 2021-09-09 05:13:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 1f983ec134b27a9067befbb350ca3664 SHA-1: d359d0a394500137810c7f9a47d78de553214e20 SHA-256: 65333a627340fafc064247b9c2e37ea9a3c0a6aac9ffdf010efd3576da7cf68d
226 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs and exhibits characteristics of a link farm, suggesting it's designed to redirect users to malicious content. High-severity heuristics indicate it's a lure for password-protected archives and a request for recovery secrets, strongly pointing towards credential harvesting or financial fraud. Although no scripts were directly extracted, the PDF structure and URL patterns are consistent with phishing campaigns that often employ JavaScript for obfuscation or payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/161345adebbe75---jetanejigogig.pdf In PDF document text
    • https://airflow-skateboards.com/upload/file/bodevipinudopi.pdfIn PDF document text
    • http://nobody-films.com/bpms/includes/fckeditor_uploads/userfiles/file/96438676861.pdfIn PDF document text
    • http://sgyscom.com/upload_fck/file/2021-9-4/20210904111111388220.pdfIn PDF document text
    • https://www.unicodesystems.com/wp-content/plugins/super-forms/uploads/php/files/u01fvdvn5ea42upuaj2f54f2l5/golugikixewid.pdfIn PDF document text
    • http://123flower.doweb.kr/upload/files/27577763451.pdfIn PDF document text
    • https://comfortinnbarrie.com/phpsites/vertical_living/uploads/file/foxowipuguminokisut.pdfIn PDF document text
    • https://www.ccs-corporation.com/ckfinder/userfiles/files/vegesofamowirovefas.pdfIn PDF document text
    • http://noospc.ru/SITE/files/editor/file/kudebuwakotonomeb.pdfIn PDF document text
    • https://ganport.pl/userfiles/file/43034908493.pdfIn PDF document text
    • http://xn--72c7caerxx0d3a9eve.com/UserFiles/File/88407910426.pdfIn PDF document text
    • http://max-metal.pl/gfx/file/gedawerefonilifabepevatek.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/fisutakazanefaxabekewid.pdfIn PDF document text
    • http://galantemontagnana.it/ckfinder/userfiles/files/61117756274.pdfIn PDF document text
    • http://hongdanhaudio.com/luutru/files/54765200962.pdfIn PDF document text
    • http://laptopplus.be/app/webroot/files/userfiles/files/59354968637.pdfIn PDF document text
    • http://pincailight.com/zk/UploadFile/file/2021090902162273499.pdfIn PDF document text
    • http://hoaiduc.edu.vn/ckfinder/userfiles/files/37695365611.pdfIn PDF document text
    • http://www.parkwaytransplant.com/media_upload/upload/files/49613920883.pdfIn PDF document text
    • http://thoitrangvabaoho.com/Images_upload/files/71010881111.pdfIn PDF document text
    • https://nslogisticservice.com/userfiles/files/73514071325.pdfIn PDF document text
    • http://vendsol.com/userfiles/file/65955378564.pdfIn PDF document text
    • http://jinshi66.com/uploadfiles/files/matuletujiduf.pdfIn PDF document text
    • http://www.sospapa24.com/lib/ckfinder/imgupload/files/1982020227.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=linux+command+library+apkPDF 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_off0000ec51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC51 17788 bytes
SHA-256: 85fe80dedd1fdd5ddd9b0dbaacb3650dfcdaf689a1245e57e007cb5b31fb2768
font_01_sfnt_off00011b46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B46 10784 bytes
SHA-256: 9c8d88a9c04dc5464daf4d8c53b1a81116ecf851c912be99a57c448213b13bce
font_02_sfnt_off000133ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133CE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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