Malicious PDF — malware analysis report

Static analysis result for SHA-256 7093cc7969883ad8…

MALICIOUS

PDF

106.1 KB Created: 2021-07-13 21:16:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 66daccc65713c61fe123fa44cf97a88d SHA-1: c64e8264afb234a1d04ce927c8d0aef95b91a428 SHA-256: 7093cc7969883ad86f85784f9b393df17c22293bc60f055d52a6727053bbbb83
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links pointing to various domains, many of which are hosted on compromised CMS platforms or disposable hosting, indicating a link farm designed to obscure the ultimate destination. ClamAV and ML classifiers strongly indicate malicious content, specifically a phishing or trojan distribution attempt. The presence of multiple external URIs and link farms suggests an attempt to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://staples1981.com/clients/b/ba/ba027a536d51c1d997ee76cae6dc9017/File/lerupexidideratosibowon.pdf
    • http://forter.vn/hinhanh/file/malolosunukusipefevirekik.pdf
    • https://grafitpoint.ru/wp-content/plugins/super-forms/uploads/php/files/39dc04203b3eb9ba22cfbebc7aadddbb/nabavekazomuda.pdf
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607298accefdb---29019205892.pdf
    • http://antiochhighclassof70.com/clients/4/4a/4a4d67c83f6236388cbe8d22d68d4f91/File/dipabuxijimorizubinitoriw.pdf
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/vbsqm31p34iton0tef913bacu5/90125386661.pdf
    • https://upaspor.com/resimler/files/laliwuleriposivosakux.pdf
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081123341301---pireferavuvut.pdf
    • http://brightwayconsultancyservices.com/userfiles/file/52064844456.pdf
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16090378a4bf8e---merilunisep.pdf
    • http://studioingegneramato.com/userfiles/files/58196620596.pdf
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5bed88bbc9---32761588052.pdf
    • https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/a5g4viracfcv3680ndpi7m2a15/gubajifojewojunavidosigo.pdf
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160b5b2623e81a---pepipasep.pdf
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/160cef38ca350f---97082176961.pdf
    • https://eastmanllc.net/ckfinder/userfiles/files/33438063198.pdf
    • https://fiambreszav.com/wp-content/plugins/super-forms/uploads/php/files/c9aa2917aa01b8af647310b36e6aea1d/67390054152.pdf
    • http://pvsystreports.com/wp-content/plugins/super-forms/uploads/php/files/fk7rda8p8dnu1fjgnj3r1417b0/82256876618.pdf
    • https://bonpetsupply.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc585653e0---vigadotekepemoguba.pdf
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/r551r25s597cfah1c85no6etqc/89279858227.pdf
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160c8c0a75ae53---tamilakufopupexevamusu.pdf
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d445b26426---9109043041.pdf
    • http://usmleworkout.com/files/file/58132495777.pdf
    • http://tikatalog.sk/_files/file/valerenutawoxu.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=the+great+deception+pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013f0e.bin
cc95952d5c919dff1b02d59964bd4144266506f9660ec9b2aa145f33ed768ded
pdf-font-stream PDF embedded font (sfnt) at offset 0x13F0E 10648 bytes
font_01_sfnt_off00015723.bin
c4ac16e3995ce48da6029c65a8201fc28b2b173bd30fdb41d73c7840a78fd0f9
pdf-font-stream PDF embedded font (sfnt) at offset 0x15723 16920 bytes
font_02_sfnt_off00018324.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x18324 16792 bytes