Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4f0f4d1ee958929…

MALICIOUS

PDF

74.2 KB Created: 2021-09-08 04:08:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 6a60c8ec82d863ad6eb395f0d596cd03 SHA-1: a2eb6f12d3d42c542a18934622aa71c00d4639d2 SHA-256: d4f0f4d1ee95892965193ed4656401b4ae6dd2b7be5f7b3e6cb780dbb9211faa
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a link farm pointing to numerous websites, many of which are hosted on compromised CMS uploads or disposable domains, suggesting an attempt to distribute malicious content or conduct phishing. No scripts were extracted, but the presence of numerous external links indicates a likely intent to redirect the user to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://ukkies.be/userfiles/file/poresobabixu.pdf In PDF document text
    • https://msr-hudsonproperties.com/wp-content/plugins/super-forms/uploads/php/files/028028482ae4197cadbbb7417a6f1eba/turiwakozazojonixa.pdfIn PDF document text
    • http://wingmanplanningdemo.com/userfiles/files/25256679959.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/gofejuti.pdfIn PDF document text
    • https://sitpchemcieszyn.pl/_sitpchem/file/subokaludarofujodobebusa.pdfIn PDF document text
    • http://payassistinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e4fdce132f---72380111803.pdfIn PDF document text
    • https://xn----9sbccjdbca7cyaieg1a3j.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/eb10c6bd1a9fb2e6b009d79cafa95995/65420799868.pdfIn PDF document text
    • https://xenang-mitsubishi.com/fckupload/file/wafenelagorugizazedu.pdfIn PDF document text
    • https://dd-inside.de/userfile/file/43174259264.pdfIn PDF document text
    • http://munsusa.org/userfiles/file/20210523040516.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/604caeff8275fead61d082c7643dd91a/libuxovuxusuzu.pdfIn PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/b5093d2aaaee374a2150fa89ffb05f07/kakatokusaginezivuripaxo.pdfIn PDF document text
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f72c2ea2a3---5693300927.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074130a621f3---59592006747.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16084bbceebb53---4667742382.pdfIn PDF document text
    • http://bluestandard.pl/ckfinder/userfiles/files/nejugadugedon.pdfIn PDF document text
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/f60a88a204fb01f6586e7f8a3c1dbd80/55156970665.pdfIn PDF document text
    • https://thejasmineway.net/wp-content/plugins/super-forms/uploads/php/files/s1sjnr2pui5iq0orfrc154tnoc/lapolukokumujim.pdfIn PDF document text
    • http://fotossc.pl/_files/file/54003032205.pdfIn PDF document text
    • http://ohsongpharm.com/ckfinder/userfiles/files/zabodireb.pdfIn PDF document text
    • http://magendans.com/imagefiles/file/80415411036.pdfIn PDF document text
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/c87ceaf890b1772ddf2cf988eef8706f/masufiwezuxobuwetiwamuri.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=2012+gmc+terrain+slt+manualPDF 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_off0000bd70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD70 17280 bytes
SHA-256: 272d14c2160bbb4602600b08bf534e62490e50dcf9ff18db69d0105b1d5e0469
font_01_sfnt_off0000ea2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA2E 10748 bytes
SHA-256: c27c1aca1a98548ab889b99eda32b974818340ca4daea8cd39fd9cba86b2e1d7
font_02_sfnt_off000102fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102FB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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