Malicious PDF — malware analysis report

Static analysis result for SHA-256 50a159484a0cb9c9…

MALICIOUS

PDF

81.2 KB Created: 2021-09-19 03:47:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 2d4431ae1fb61c3bddd291ea26ca3c77 SHA-1: f0a0fd75db608fe9010355a10d704145ec5d360b SHA-256: 50a159484a0cb9c90a7c130555123045652c7bffcd2dda188c8a9c3545d6b9f2
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The heuristics reveal numerous embedded URIs, including one pointing to a raw IP address, suggesting a link farm designed to redirect users to potentially harmful content. The presence of multiple PDF_URI firings and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic strongly indicate a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pixomot.ru/uplcv?utm_term=power+rangers+samurai+online+free PDF link annotation
    • http://goodmax.ru/i/files/moxebifobit.pdfIn PDF document text
    • http://aallergy.netlovestories.com/upload/files/93740620131.pdfIn PDF document text
    • https://sakesushimn.com/userfiles/files/34074915372.pdfIn PDF document text
    • http://kipia-nn.ru/userfiles/file/42629431943.pdfIn PDF document text
    • https://mldom.xyz/web/img/podborky/files/nijijositemunagutoviliwux.pdfIn PDF document text
    • http://3mfa.com/images/editor/files/99468204204.pdfIn PDF document text
    • http://eg-connect.com/php_codes/Scott/VieauAssociates/code/userfiles/file/toxewebibubupumumid.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612e9c0e74720---duzubixovikovowifekuzuz.pdfIn PDF document text
    • http://m-camper.ru/ckfinder/userfiles/files/manodoripomu.pdfIn PDF document text
    • https://total-sport.pl/img/upload/files/wevovojivubiwabubimuwax.pdfIn PDF document text
    • http://gd-weimi.com/upfolder/e/files/20210916032605.pdfIn PDF document text
    • http://utuin.net/files/fckeditor/file/31496268928.pdfIn PDF document text
    • http://rosesrealtyhomes.com/userfiles/files/sowidosumulofeporolajugiv.pdfIn PDF document text
    • http://automsystem.com/UploadFile/file/20210918025330124.pdfIn PDF document text
    • http://sangjeom.com/userfiles/file///xisurowi.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/161413c029aeff---rasipeduje.pdfPDF link annotation
    • http://wonderful-foods.net/userfiles/file/pinelatebaxowanakemutora.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161363a7511186---pibarerekojebijume.pdfIn PDF document text
    • http://www.mueblesgamez.com/ckfinder/userfiles/files/xewokufizudev.pdfIn PDF document text
    • http://nova-auto.com/upload/jedikolasutoterupegegero.pdfIn PDF document text
    • https://parlagame.com/calisma2/files/uploads/92208209268.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_off0000d67b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD67B 10648 bytes
SHA-256: 0045a627905a723f422167cf80895c2c669b6d6722fbef1a0fb00d9c6eea0c55
font_01_sfnt_off0000eee6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEE6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000106f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106F8 18320 bytes
SHA-256: d2c7c797c91d42bb886ada976bc4c761126d67b8d28a7872eb61e0304c27b4b4