Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cf299c82aa426d0…

MALICIOUS

PDF

96.2 KB Created: 2021-09-19 08:14:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 0fff4e9bea0a6caec14c8b4dafa40dd0 SHA-1: 5f7225dfec82e7589900914fcba2ea2a2cb83a6e SHA-256: 0cf299c82aa426d07b179bb6676a3c02237c27224662dcb6fb6f72f224112bc7
206 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs and a high ML classifier score, indicating malicious intent. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' strongly suggests the document is designed to trick users into downloading a password-protected archive, likely containing a malicious payload. The presence of embedded URLs and the ClamAV detection further support this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://oniceh.ru/uplcv?utm_term=how+to+clean+the+memory+on+my+phone PDF link annotation
    • https://mallorcaboom.com/res/wysiwyg/file/rudupeniwanusa.pdfIn PDF document text
    • https://kga-am-adlergestell-ev.de/kga/ckfinder/userfiles/files/tojafusemijaxipubeditu.pdfIn PDF document text
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/96ac23f9af05824bec2178094911d9d2/gudegotoxalib.pdfIn PDF document text
    • https://yk-tech.com.tw/ckfinder/uploads/ckfiles/files/928604366.pdfIn PDF document text
    • http://utpcomp.ru/uploads/files/70165829478.pdfIn PDF document text
    • http://ventilatoryzlin.cz/images/file/40243242300.pdfIn PDF document text
    • https://junona.manyel.website/images/uploads/medium/7562192195.pdfIn PDF document text
    • https://icbacademy.com/upload/files/37443861726.pdfIn PDF document text
    • http://vector-mebel.ru/uploads/files/59777334236.pdfIn PDF document text
    • http://178.62.148.222:300/ckeditor/ckfinder/userfiles/files/28969326694.pdfPDF link annotation
    • http://ozcetinler.com/userfiles/file/35333237618.pdfIn PDF document text
    • https://enerjimakine.com/tsrm1/img/userfiles/file/97255371056.pdfIn PDF document text
    • https://planningpvedh.nl/ckfinder/userfiles/files/43199045709.pdfIn PDF document text
    • https://chezgregoire.fr/userfiles/55610189150.pdfIn PDF document text
    • http://dlastudenta.org/Upload/file/pavipelepetizonolupulax.pdfIn PDF document text
    • https://agape4u.org/userfiles/file/lojalanunusudutaratukeg.pdfIn PDF document text
    • http://t-p-fortune.com/userfiles/file/52995399571.pdfIn PDF document text
    • https://jss-moms.si/upload/File/66436457159.pdfIn PDF document text
    • https://uangraja.com/contents/files/3942041899.pdfIn PDF document text
    • http://spynet.gr/Administrator/uploads/userpics/OutPostImages/files/denelujaf.pdfIn PDF document text
    • https://macauroommate.com/ckfinder/userfiles/files/43804118366.pdfIn PDF document text
    • http://bioscipublisher.com/files/upfiles/file/panewuvoj.pdfIn PDF document text
    • http://ambiance-cinema.fr/wp-content/plugins/super-forms/uploads/php/files/5dca33ace52da3e8a212b551828c2cc9/vuwixipenosimesaka.pdfIn PDF document text
    • http://sjar-tech.com/uploadfile/file///2021090522463126.pdfIn PDF document text
    • https://artistaone.co/userfiles/files/2261241072.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_off00011372.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11372 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012b89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B89 10572 bytes
SHA-256: 4857be8901ddcee4cbc6b2745b9c041793a68d5634f60c412280bf1154d5429e
font_02_sfnt_off0001437c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1437C 18400 bytes
SHA-256: 133282c48cd6ce01e07ee31643d3986fd85526c23464f5362b9812915c5d3850