Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6e993a7f242eae2…

MALICIOUS

PDF

72.3 KB Created: 2021-09-11 14:47:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: f1e6a091e161e2ea68bced10695f0e65 SHA-1: e99a645d30c9d9346e1054064141dd9826e17745 SHA-256: c6e993a7f242eae2bb97668f4ae53f541a496e715bc2e7c9ac3461602fec59e3
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML and ClamAV as malicious, with heuristics indicating it functions as a link farm. The embedded URLs, particularly those hosted on disposable domains, suggest an attempt to redirect users to malicious sites. While no scripts were explicitly extracted, the nature of PDF malware often involves JavaScript for obfuscation and payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 5

  • 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.
  • 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://hostsolutions.ro/app/webroot/files/userfiles/files/beviwotebap.pdf In PDF document text
    • http://tcyy88.com/userfiles/file/2021090200591973499.pdfIn PDF document text
    • https://dubaimotorcycletours.com/uploaded_images/files/39640206976.pdfIn PDF document text
    • http://guidesdugrandlarge.fr/images/import/file/xotetoxafosumukinam.pdfIn PDF document text
    • http://lycee-elm.org/userfiles/file/60878270632.pdfIn PDF document text
    • https://www.eos.org.eg/ckfinder/userfiles/files/zuzokoroteropodojox.pdfIn PDF document text
    • http://amsasecretariat.fr/userfiles/file/76982903550.pdfIn PDF document text
    • https://tims.ro/ckfinder/userfiles/files/mipevutalixetunov.pdfIn PDF document text
    • https://smartstone.ca/userfiles/files/gejatibet.pdfIn PDF document text
    • http://canshu.dlzj.net/upload/files/20210911015828693481.pdfIn PDF document text
    • http://3asoft.vn/img/files/26355059060.pdfIn PDF document text
    • https://digireg.dk/upload/lusofufoxirawotitugejama.pdfIn PDF document text
    • http://hoclaixebinhthuan.com/upload/contentFile/file/96798238634.pdfIn PDF document text
    • http://xn--80aer5aza.xn---42-5cdakyymnnb9ake1az.xn--p1ai/ckfinder/userfiles/files/45619994133.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1612f6dcf79f14---nekidiwenemimix.pdfIn PDF document text
    • http://jocoseatee.com/userfiles/files/zifelivevibajojomu.pdfIn PDF document text
    • https://mkycc4.com/kycc4.com/userfiles/files/rozireka.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613267bb3519c---62434855283.pdfIn PDF document text
    • https://stiff.pl/ckfinder/userfiles/files/71845152291.pdfIn PDF document text
    • http://suarezbeltran.com/aym_images/files/28144155827.pdfIn PDF document text
    • http://kfgame.snailgame.ru/upload/files/20210911013845.pdfIn PDF document text
    • https://clubesolbra.com/uploads/files/89421858682.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=graph+quadratics+in+standard+form+calculatorPDF link annotation
    • 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_off0000b854.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB854 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d066.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD066 16112 bytes
SHA-256: 77e7de640015fbe75eb3a157c74aeda2599ea157a1b6ffa7ff0ce8ad9a889903
font_02_sfnt_off0000fa27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA27 11036 bytes
SHA-256: 35397ce4020b544762adaf10d57f3a6744fd35cbcc89c3e12d24b2fa8aed351e

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