Malicious PDF — malware analysis report

Static analysis result for SHA-256 747a3665e2995485…

MALICIOUS

PDF

83.7 KB Created: 2021-09-06 05:36:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 1b1a418f3c7e11cc21da40cdbd10fa43 SHA-1: a9e3e33ba8d99982384a16fe22e6ce828de88e27 SHA-256: 747a3665e29954857cc38ec092d560eb5ae0dd4fc883900f69ed8f2c84354f5c
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to numerous PDF files hosted on various domains, some of which are identified as compromised WordPress uploads. The document's structure and the presence of multiple external links suggest an attempt to direct users to malicious content, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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 http://jiendurancecoaching.com/ckfinder/userfiles/files/xasaxokojatexiniribozi.pdf In PDF document text
    • https://bhiringisamsankalimandir.org/userfiles/file/53315421134.pdfIn PDF document text
    • http://drsrkbedcollege.com/ckeditor/ckfinder/userfiles/files/48779114794.pdfIn PDF document text
    • http://www.extramas.com/userfiles/files/88181826506.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/065cj8d9d5m7nja5r7cl2l4836/vitipuvasuxawuwaz.pdfIn PDF document text
    • http://diamond6ranch.com/userfiles/file/70437071376.pdfIn PDF document text
    • http://phone-server.com/userfiles/file/22639554105.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160db5999559fa---33985458475.pdfIn PDF document text
    • http://www.bluewhaleline.com/image/upload/File/wesarolipolugine.pdfIn PDF document text
    • http://sbstroy53.ru/img/files/23438278251.pdfIn PDF document text
    • http://crm333.com/documentos/file/loxinebinefowerufisawulu.pdfIn PDF document text
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607d9a41c5558---67128550051.pdfIn PDF document text
    • https://mt-creativestudio.com/ckfinder/userfiles/files/wefufunajagesejipib.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4811950391---813856092.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8e0c24929d---nopunawejemabixibemun.pdfIn PDF document text
    • https://totounited.com/contents//files/kakakibumegosegiz.pdfIn PDF document text
    • https://fetogram.com/images/upload/files/90703951680.pdfIn PDF document text
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/baidaa36n6n2l0kat15q0bdol6/51859644678.pdfIn PDF document text
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160fd44abb7b7e---nimijazopigoturonofodepox.pdfIn PDF document text
    • http://circolosilverblufitnessclub.eu/userfiles/files/85901075075.pdfIn PDF document text
    • https://securitegenerale.tn/userfiles/file/89713413818.pdfIn PDF document text
    • http://webinaris.net/ckfinder/userfiles/publics/files/kiruva.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=manual+da+impressora+canon+g3100PDF 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_off0000dbd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBD4 19116 bytes
SHA-256: daa0a2aac26cdf142e497b2dfe3336c4fc70dc7e560fbd252279ca22b531a5ab
font_01_sfnt_off00010d78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D78 11200 bytes
SHA-256: b186534c4d3a3b821f64bdf12c1968e0d7f30fd4ed834df710ec45ffdacff8f7
font_02_sfnt_off0001276a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1276A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1