Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fdcbf54c0f0e30d…

MALICIOUS

PDF

77.4 KB Created: 2021-09-22 23:08:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 63b0232f1e1221f1709df5d5476dc91e SHA-1: 7f6aa38f799ef254984eeb64a8d211f429cf3e69 SHA-256: 7fdcbf54c0f0e30d4b249f4bb4add6c81482036da2fa69fd9dcff528721f4f40
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Multiple heuristics point to the PDF containing a link farm on disposable hosting and compromised CMS uploads, suggesting it's designed to redirect users to malicious content. The embedded URLs, particularly the IP literal, are strong indicators of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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
  • 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.
  • 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://alohasafaris.com/files/wunotoxakaxekuse.pdf In PDF document text
    • http://ilyxrace.com/userfiles/files/40252615485.pdfIn PDF document text
    • http://cesishotel.com/res/wysiwyg/file/40080494074.pdfIn PDF document text
    • http://ozgu-yapi.com/firma/files/51895177002.pdfIn PDF document text
    • https://sapporopools.com/contents/files/14311987527.pdfIn PDF document text
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/ockf8er8p84hnoara1godv8vnb/tituduxoni.pdfIn PDF document text
    • http://abwalabamaave.com/uploads/files/5179564237.pdfIn PDF document text
    • http://birnagarcollege.in/userfiles/file/10928543772.pdfIn PDF document text
    • https://forexinc.ca/upload/editor/file/nezapokil.pdfIn PDF document text
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/fb80346e36405e058c5da372aebca7bb/sisipog.pdfIn PDF document text
    • http://steinbach.casawell.tw/userfiles/file/mulapoxen.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613334049f6a2---jawiliwuvibaxadefigif.pdfPDF link annotation
    • http://degeninhotel.ru/admin/ckfinder/userfiles/files/45173891753.pdfIn PDF document text
    • http://xn--80aaa6aachkjln0qra.xn--p1ai/ckfinder/userfiles/files/24581147728.pdfIn PDF document text
    • http://ambartakip.net/belgeler/file/1144255601.pdfIn PDF document text
    • http://makesrealsense.com/ckfinder/userfiles/files/30848610775.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613c070eec464---nevowojiwijejizuk.pdfIn PDF document text
    • http://rockefellersgold.hu/editor_up/45994797241.pdfIn PDF document text
    • http://okzawidow.pl/img/upload/files/69620464048.pdfIn PDF document text
    • https://btsis.com/upload/ckfinder/files/25182307006.pdfIn PDF document text
    • http://duonglaohanoi.com/userfiles/file/89172572969.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=export+pdf+to+xlsPDF 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_off0000cca2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCA2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e4b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4B9 10088 bytes
SHA-256: cf1c860264b4207f9d3edbce5de1a3caa1fb956f701ff8f293234aa30252abf7
font_02_sfnt_off0000fb4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB4A 17564 bytes
SHA-256: 47fcf63ae3af3403ce5b783787662a746c1a0ec8ce60cebdebadf74d47f7a3fd

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