Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7680087384dffa3…

MALICIOUS

PDF

83.7 KB Created: 2021-09-19 02:55:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 862b0d4afe2011432642a57492a91283 SHA-1: 2bfb3d3b443e8528421de01820f3cd6c321839af SHA-256: e7680087384dffa33f5191cf873b11d0e40556b94994167b20fc4f4148af3eb0
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. The heuristic 'SE_CALLBACK_LURE' suggests the document may be designed to trick users into calling a fraudulent number, consistent with tech-support scams. Numerous embedded URLs point to external resources, likely for further payload delivery or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://laborke.ru/uplcv?utm_term=bookmark+chrome+hilang PDF link annotation
    • https://fuoriscena.eu/file/18728993821.pdfIn PDF document text
    • https://777mto.org/contents/files/71641976696.pdfIn PDF document text
    • http://barahi.com/assets/userfiles/files/84628131695.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613777912ddec---febilos.pdfIn PDF document text
    • https://www.channeloflove.com/ckfinder/userfiles/files/fasenarupumi.pdfIn PDF document text
    • https://wecareprogram.org/images/file/39557497999.pdfIn PDF document text
    • https://shoppingplanet.cityplanet.ro/ckfinder/userfiles/files/lomezututojuwujoja.pdfIn PDF document text
    • http://pamatudarbai.lt/ckfinder/userfiles/files/lulonesizekiwadux.pdfIn PDF document text
    • http://pokeocncafe.com/uploads/files/24706644580.pdfIn PDF document text
    • https://norservis.info/files/files/dizijeputukazizurutabojig.pdfIn PDF document text
    • http://agrostroi-proekt.ru/ckfinder/userfiles/files/batufefulitozogunovofow.pdfIn PDF document text
    • https://hatinhjobs.com/upload/files/lopajenivilelobesibitor.pdfIn PDF document text
    • http://cnokorea.com/userfiles/file/ropuvebekexakitibewed.pdfIn PDF document text
    • https://rintrans.com/files/lepusaf.pdfIn PDF document text
    • http://gsprojekt.eu/userfiles/files/87437192835.pdfIn PDF document text
    • http://membranekeyboard.pl/_data/file/79335122100.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614662af5b2c5---tejebedofidototom.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/1613388b1dbf52---15208771107.pdfIn PDF document text
    • https://kominove-centrum.cz/media/files/file/14742944978.pdfIn PDF document text
    • http://lblussana.it/images/file/68260050813.pdfIn PDF document text
    • http://basaritarim.net/admin/editor_resim/file/21989507439.pdfIn PDF document text
    • https://manusingh.org/scgtest/eec-new/codelibrary/ckeditor/ckfinder/userfiles/files/gagumurawubatazagefade.pdfIn PDF document text
    • http://vrakskodamnetice.cz/file/89621947096.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_off0000e048.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE048 10556 bytes
SHA-256: b89ed44a23caa974a0d4b8cdea6ee93c2ae69dc5ba9d00ac9719d213530e686b
font_01_sfnt_off0000f821.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF821 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011033.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11033 18780 bytes
SHA-256: 1bf7be652c4da267b0981ffd643e2cfab945fe3e2486f8d73d9816211dc1ef6b