Malicious PDF — malware analysis report

Static analysis result for SHA-256 599ce2044991f714…

MALICIOUS

PDF

69.2 KB Created: 2021-09-09 05:56:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 5f40b6271ce85df27223d0c76d3adc3e SHA-1: d6b3f2cebed3d4158372ef81ce976408330fcf21 SHA-256: 599ce2044991f7147cb949831e6fcda3d16312c535a9054aa1867c8406f6a850
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier. It contains numerous external URLs, many of which are part of a link farm on disposable hosting, suggesting a phishing or malware distribution scheme. The presence of embedded URLs and the overall structure indicate an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://crysiq.ru/uplcv?utm_term=talking+tom+friends+game+download+apk PDF link annotation
    • http://whitedwarf.ru/public/images/ckfinder/files/65622850735.pdfIn PDF document text
    • http://tarnava.eu/user_images/file/63270417066.pdfIn PDF document text
    • http://specialcats.nl/media/files/susemur.pdfIn PDF document text
    • http://theprofitnesstrainers.com/userfiles/file/20953135885.pdfIn PDF document text
    • http://tienphat.vn/imagesflashupload/file/68272728100.pdfIn PDF document text
    • https://smsenerji.com/resimler/files/9254573256.pdfIn PDF document text
    • https://palezieux.com/ckfinder/userfiles/files/disobujovulitugidokixo.pdfIn PDF document text
    • https://titishop.co/upload/files/12087264043.pdfIn PDF document text
    • http://associazionemillesogni.it/userfiles/files/88020693328.pdfIn PDF document text
    • http://crm333.com/documentos/file/99031056105.pdfIn PDF document text
    • http://ecohouse-lab.de/userfiles/file/6539934931.pdfIn PDF document text
    • http://7seapharmtech.com/Uploadfiles/files/rejam.pdfIn PDF document text
    • http://tuvantindat.com/uploads/2021-09-02/images/files/kebelifiratukurujogoxado.pdfIn PDF document text
    • http://www.taxivanclass.com/uploads/ckfinder/files/89090707956.pdfIn PDF document text
    • http://risme.vn/files/59529542812.pdfIn PDF document text
    • http://depcip.com/app/views/panel/ckfinder/userfiles/files/37609059316.pdfIn PDF document text
    • https://floridainvestment.cz/files/file/68110786415.pdfIn PDF document text
    • http://domgr11.ru/uploads/files/99161062179.pdfIn PDF document text
    • https://mpksieradz.pl/upload/file/moneritetifemoxonafira.pdfIn PDF document text
    • http://architettoangeli.it/userfiles/files/88208906327.pdfIn PDF document text
    • http://evergladesharvesting.com/ckfinder/userfiles/files/lugawovubijefegi.pdfIn PDF document text
    • http://www.deep2001.com/images/library/File/sonimepuxumadulegoxavo.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_off0000b246.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB246 10980 bytes
SHA-256: c9e8ca8cdeffcae866ced4c474c3b8a5f3fd4884cd6fdc869d9aa043cc27fb62
font_01_sfnt_off0000cb99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB99 14016 bytes
SHA-256: 2c34ca4c2f521882a536dbcd1b4908dec48c171b9f59744bc53438e27c4f0f10
font_02_sfnt_off0000eebb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEBB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.