Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e2462cfbaf660e3…

MALICIOUS

PDF

70.9 KB Created: 2021-09-26 02:25:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: a98b405ec409f2e06bbadb092126c043 SHA-1: 8b1d2f2af55073ea88459d52958877edf6a0b860 SHA-256: 6e2462cfbaf660e35e9921f4ecf8f762372fd540aed4c1317e033a62ba4878d9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a link farm. Multiple heuristics indicate the presence of numerous external links, with some pointing to compromised CMS uploads. The document body is heavily obfuscated, preventing analysis of its specific content, but the overall structure and URL analysis suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://tekmaker.com/upload/files/benujogifogigek.pdf In PDF document text
    • http://gskrem.ru/img/file/sutezibetevu.pdfIn PDF document text
    • http://anadolumatbaa42.com/genelresimler/file/46547697940.pdfIn PDF document text
    • http://mibenjamin.com/userfiles/file/76184935418.pdfIn PDF document text
    • http://termosystem.pl/userfiles/file/97807474869.pdfIn PDF document text
    • http://simonide.org/userfiles/file/41722908140.pdfIn PDF document text
    • http://etalentlink.com/uploadfile/file///2021091104282491.pdfIn PDF document text
    • http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141f8368feda---90406711278.pdfIn PDF document text
    • https://radmangroup-ye.com/rgfiles/file/45027427515.pdfIn PDF document text
    • https://mobspace.xyz/web/img/podborky/files/57383594610.pdfIn PDF document text
    • https://jackinthegym.com/uploads/files/202109232115392728.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1612ff701bfb77---38764654167.pdfIn PDF document text
    • http://luberoff.com/userfiles/file/70904728462.pdfIn PDF document text
    • http://jinanxintiandi.com/userfiles/files/katikube.pdfIn PDF document text
    • https://mobilpetrol.olajpark.hu/files/files/lodosiwimepuv.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614f7373313f4---xojavimijefa.pdfIn PDF document text
    • http://global-leasing-management.com/uf/file/mofixape.pdfIn PDF document text
    • http://saharun.org/uploads/ckfinder/userfiles/files/9372716135.pdfIn PDF document text
    • https://proxus.nl/file/kawikowoze.pdfIn PDF document text
    • http://exhibitionchannel.com/upload/70366190699.pdfIn PDF document text
    • https://euforbiabulgaria.com/uploads/pages/files/10717516013.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=how+to+unlock+someone+phone+pattern+without+losing+dataPDF 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_off0000af4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF4A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c761.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC761 11228 bytes
SHA-256: 5a6f53ddf6f044cd1d8a3208c03990520bfc390879f8b62b5e03a40cfcca9446
font_02_sfnt_off0000e14e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE14E 16976 bytes
SHA-256: 71eeb3e2bfc92031638e57568ad2259d6f8a3ac11750310cc0a9a200d6a9cfcb