Malicious PDF — malware analysis report

Static analysis result for SHA-256 d70e9601ea00757e…

MALICIOUS

PDF

86.1 KB Created: 2021-09-21 03:34:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 3b8909834e73e9a399ff1e67f2333e0a SHA-1: cd468d52082a1cd984b691430c8b122fdd9484b2 SHA-256: d70e9601ea00757eeb453c2e580361fa570c405e55957b6839190add843f0edc
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many hosted on disposable domains, and one directly points to an IP address, indicating a link farm designed to redirect users to malicious content. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, suggesting a tactic to obscure the true destination of the links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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
  • 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.
  • 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://drafthe.ru/uplcv?utm_term=ios+with+android+wear PDF link annotation
    • http://varadimasszazs.hu/uploads/files/17381280926.pdfIn PDF document text
    • http://helenhotel.vn/upload/files/69024888785.pdfIn PDF document text
    • http://www.southforconstruction.com/frontend/web/ckfinder/userfiles/files/7243848945.pdfIn PDF document text
    • http://school19-zav.ru/userfiles/file/gozidejujedulorekerojij.pdfIn PDF document text
    • http://211.129.1.225/system/ckfinder/userfiles/files/zafizid.pdfPDF link annotation
    • http://africanhairbraidingsalon.com/userfiles/file/besupizomexajerewexobabot.pdfIn PDF document text
    • http://aotwresort.info/ckfinder/userfiles/files/diwutopokunudebegiseniguj.pdfIn PDF document text
    • http://phuongsen.com/img-chamthi/files/sopuxojaf.pdfIn PDF document text
    • https://siam-royal-view.ru/data/files/38061642161.pdfIn PDF document text
    • http://www.greenfield-sustainability.com/images/files/70396896879.pdfIn PDF document text
    • http://hatdesechia.com/storage/ckfinder/files/45072940830.pdfIn PDF document text
    • http://vibrobeton.by/pics/files/8396795047.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/q28n5hn7lodhqet6mgreh0mjo3/1388724051.pdfIn PDF document text
    • http://divapharma.com/uploaded/file/benurefikovaxi.pdfIn PDF document text
    • http://izhar-energy.com/userfiles/file/bepololoro.pdfIn PDF document text
    • http://olynskiconstruction.com/pics/file/jajiki.pdfIn PDF document text
    • http://wahluenfty.com/userfiles/mimekokulanidufuw.pdfIn PDF document text
    • http://ampletrekking.com/userfiles/file/91767777443.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/161448e5169d0f---71950149492.pdfIn PDF document text
    • https://autopsrus.com/ckfinder/userfiles/files/63684354702.pdfIn PDF document text
    • http://birzebbugastpetersfc.com/files/file/33816555804.pdfIn PDF document text
    • http://4x4autok.hu/userfiles/files/wugepokutuw.pdfIn PDF document text
    • https://jungleflightchiangmai.jungle-flight.com/Uploads/files/jasuwakeweweju.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_off0000e246.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE246 21672 bytes
SHA-256: 258859839df780875baddc7b81952c7c16dc83077c34795ff1b17fb57e031045
font_01_sfnt_off00011b4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B4B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013362.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13362 10336 bytes
SHA-256: 7a08043fbef1759612e0d6db84d1039de38afa57a31697b2e330bad027c1a6ee