Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec60e8f7b3d4aeee…

MALICIOUS

PDF

81.8 KB Created: 2021-09-13 05:34:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 817a092343d83d6742ba4e7e44cbaa6f SHA-1: 0b59378f0720e33381a59ba1463b27b059ea34d2 SHA-256: ec60e8f7b3d4aeeec1346bd3b47d6bcae4b911e9fcc1ef7defc5edc0aff6102f
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs that form a link farm, likely intended to redirect users to malicious websites. The presence of these links and the overall structure suggest an attempt to lure users into downloading further malware or engaging in phishing activities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://philabc.ru/uplcv?utm_term=cendi+ceres+saga+mod+apk PDF link annotation
    • https://giltmorestukko.hu/ckfinder/userfiles/files/79723634624.pdfIn PDF document text
    • http://vietnam-intraco.com/webroot/img/files/26540411733.pdfIn PDF document text
    • http://seattlebestteriyaki.com/uploads/files/52478586374.pdfIn PDF document text
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/0a0c17b8a628e501a70930c8441e5d07/waxagevagadadotos.pdfIn PDF document text
    • http://vietdubai.com/userfiles/file/43358028596.pdfIn PDF document text
    • http://unternehmensberatung-hegenbarth.de/userfiles/file/41552986670.pdfIn PDF document text
    • https://novinfasteners.com/userfiles/file/61167361811.pdfIn PDF document text
    • http://ttccid.com/userfiles/file/29364516335.pdfIn PDF document text
    • http://xn--h1agcmh.com/ckfinder/userfiles/files/73976114951.pdfIn PDF document text
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/4a51610016aa95ae1752ceb0171e039f/kamoju.pdfIn PDF document text
    • http://toonesk.com/upload/32047143741.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/1613e0785ded81---69712220003.pdfIn PDF document text
    • https://rumputhijau.com/contents/files/kuwivenofewozubewebamosu.pdfIn PDF document text
    • http://gelikonline.ru/content/Files/susewivuzuw.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/1613125da7f1d7---16053332543.pdfIn PDF document text
    • http://beiwendq.com/userfiles/file/41010326348.pdfIn PDF document text
    • http://vistobrasil.net/uploads/file/56044411908.pdfIn PDF document text
    • http://houselandia.ru/files/437500037.pdfIn PDF document text
    • http://www.swaving-stalinrichting.nl/ckfinder/userfiles/files/xarirosizapewuli.pdfIn PDF document text
    • https://dondepodemosir.com/userfiles/file/gisepevunoxe.pdfIn PDF document text
    • http://studiofantino.it/userfiles/files/kikiluzirolav.pdfIn PDF document text
    • http://espokebar.com/uploads/files/xibazigevixim.pdfIn PDF document text
    • http://mextro.de/upload/files/2600948749.pdfIn PDF document text
    • https://chataigne-cevennes.fr/imgs/files/54902182299.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_off0000dc23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC23 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f43a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF43A 10836 bytes
SHA-256: 01dca6083209efffdae8a0c63059a805531408539b7e17d5baa39af8cf1a0bb2
font_02_sfnt_off00010d04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D04 17468 bytes
SHA-256: 9b76f42d2461ebfbccb056e35de67f4ecf8a6ab58ab9baa9893055f68bb28ce7

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