Malicious PDF — malware analysis report

Static analysis result for SHA-256 6dac8195c9fdf2cc…

MALICIOUS

PDF

73.3 KB Created: 2021-09-16 02:47:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 9fec5c2fa3d57f1f463da3f497db8d49 SHA-1: 85ba4aadd1976976ad22e984444d1943ac2bb8aa SHA-256: 6dac8195c9fdf2cc43486f79077fe429149c5b629c4ee27870fdc936589f9f56
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple external websites, some hosted on compromised CMS uploads. The presence of numerous links to potentially disposable hosting further supports a malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 http://superlitefan.com/uploads/files/37936957900.pdf In PDF document text
    • http://www.lovebliss.tw/UserFiles/files/61931819495.pdfIn PDF document text
    • http://www.europesolidaire.eu/userfiles/files/dejebudutalif.pdfIn PDF document text
    • http://elcivan.com/admin/UserFiles/file/dimisetagirifupozis.pdfIn PDF document text
    • http://chineseclothingonline.net/File/temujalasopivelabufuweb.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161386cff3e622---67299657171.pdfIn PDF document text
    • https://smartstone.ca/userfiles/files/zorafojuwetef.pdfIn PDF document text
    • http://www.extramas.com/userfiles/files/88181826506.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134d3507e2e3---96209685716.pdfIn PDF document text
    • http://www.lifestaralberta.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135735df2e1f---miworijafikejugexuba.pdfIn PDF document text
    • http://momsystem.ru/public/file/68953815660.pdfIn PDF document text
    • http://medicom.pl/userfiles/file/9364746802.pdfIn PDF document text
    • http://ke-sen.com/userfiles/file/1630494808.pdfIn PDF document text
    • https://poganyvolgyi.hu/userfiles/file/fagazugikufik.pdfIn PDF document text
    • https://viettincapital.vn/upload/files/79624271546.pdfIn PDF document text
    • http://wsp.pl/userfiles/file/31875225013.pdfIn PDF document text
    • http://jaluzipro.ru/public/userfiles/file/35331438479.pdfIn PDF document text
    • https://pustelnik-budownictwo.pl/ckfinder/userfiles/files/mufufumor.pdfIn PDF document text
    • http://kyochonbuenapark.iorderfoods.com/uploads/files/80908572776.pdfIn PDF document text
    • http://dianacb.cz/userfiles/file/mevunegowororosijafipi.pdfIn PDF document text
    • http://3dtechgroup.com/uploads/image/files/jipobeworir.pdfIn PDF document text
    • https://carparts-fixture.com/file/file/gawajutazakotomemozapiv.pdfIn PDF document text
    • http://blueleaves.ru/userfiles/file/fugoxo.pdfIn PDF document text
    • http://orderbestwings.com/uploads/files/nunalemadijadigegedivipol.pdfIn PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/p5nli0deguelduipge5pn1uusp/rawiranivuxoj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=how+to+connect+to+wpa2+enterprise+on+androidPDF 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_off0000bace.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBACE 16832 bytes
SHA-256: d401cd178ce847a5824203ea768e2fc5609a0e6873b0ce0ed4c62545e39093a8
font_01_sfnt_off0000e67c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE67C 10660 bytes
SHA-256: 7ddaea2537fd4770deded2442730ac0c0a2639f229ba2d44c661d2e516b67380
font_02_sfnt_off0000ff1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF1B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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