Malicious PDF — malware analysis report

Static analysis result for SHA-256 124cc03a03633763…

MALICIOUS

PDF

94.8 KB Created: 2021-07-07 21:45:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 8c110271ba20768d71529f8e27300d30 SHA-1: a31c3ad2dd5c924dd70a88228da4e8e5a02f7169 SHA-256: 124cc03a036337631a4b377c63c340055512674fb52df68b57bb2099d88f18cb
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to compromised WordPress sites, suggesting an attempt to leverage these sites for malicious redirection or hosting. The presence of link farms and the nature of the URLs indicate a phishing or scam-related attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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 https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/c3484df4c24438b8215a56f8bc2a37d0/21800240035.pdf In PDF document text
    • http://automotiveenergy.cz/userfiles/file/56050707610.pdfIn PDF document text
    • https://emmaushuis.org/pages/53175383343.pdfIn PDF document text
    • https://juhaszautovill.hu/userfiles/file/xodemuxa.pdfIn PDF document text
    • https://businesslife.com/content/file/60680217486.pdfIn PDF document text
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/ribm68hpo1sjpi4dedv2ci75r1/59910814523.pdfIn PDF document text
    • http://gewoongroen.eu/app/webroot/files/userfiles/files/55389447304.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a5b483bda19---pudixipudubupobiza.pdfIn PDF document text
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bc2fcabb21---40293373983.pdfIn PDF document text
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160baeb7aac32e---xatozexomekuviz.pdfIn PDF document text
    • http://xaydunghoangthanh.com/img_duhoc/files/sademureju.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/cbh7vpgk1bkb6c744tfmv1f3e0/34508066301.pdfIn PDF document text
    • http://aelma.com/sites/default/userfiles/file/89369302119.pdfIn PDF document text
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/1606c96604070c---wejegovinibebew.pdfIn PDF document text
    • http://progfin.pl/userfiles/file/65797069567.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/f268975f9039b2f472ece014d0987b25/veluguvuwujum.pdfIn PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/16080d73090386---xuzogimap.pdfIn PDF document text
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d290f306d4---61459578854.pdfIn PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/cc219bff76a7bab6e0092bd5036fb320/zarox.pdfIn PDF document text
    • https://realestateconnect.pro/wp-content/plugins/super-forms/uploads/php/files/6qmkiedrcqmnllfgkh39afpuh2/jezilabowusofula.pdfIn PDF document text
    • http://caratow.eu/userfiles/file/89985593543.pdfIn PDF document text
    • http://pileshoppen.dk/userfiles/file/58572587067.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=vodka+made+from+potatoesPDF 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_off00010f69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F69 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012780.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12780 10480 bytes
SHA-256: 2ea7436c5e3e14f7ae68470e544e5dba75d52fba7b6807021563f1f86c02594c
font_02_sfnt_off00013f5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F5A 17724 bytes
SHA-256: 99e5d1bd422d0831e69061c871b6547e0e965531ec5eb22b3609cab2eac842b8

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