Malicious PDF — malware analysis report

Static analysis result for SHA-256 1409112c30d86e1d…

MALICIOUS

PDF

89.7 KB Created: 2021-07-02 03:41:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 288a08d3b54a218804d342e2be0181d6 SHA-1: 0aaa4c8ba34721894c6482a69bc19d8b98867aa8 SHA-256: 1409112c30d86e1ded7c24b026964dab915410f16f62455f58c1682ddafcaf54
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains a link farm pointing to multiple compromised websites, including WordPress upload directories, suggesting an attempt to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate a malicious intent to leverage external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 https://wccia-vastu.com/wp-content/plugins/super-forms/uploads/php/files/a41b2467e656685ee42459ff7c675940/ronutesebuzubof.pdf
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160a6410f7e148---sekixexugogenu.pdf
    • http://creative-format.com/upload/editor/files/16009427690.pdf
    • https://vannordenvastgoed.nl/userfiles/file/56389520734.pdf
    • http://martom24.pl/martom/userfiles/file/15287556098.pdf
    • http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608c43dd9e50f---85750358134.pdf
    • http://archerelectricsupply.com/userfiles/file/5714711789.pdf
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606d86872ac0a---25019972687.pdf
    • http://kuehllawpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/waxazonuja.pdf
    • http://www.thaiboat.net/image/upload/File/32014984209.pdf
    • http://associatedreclaimed.com/userfiles/files/sujeked.pdf
    • https://cedarcreeksauce.com/wp-content/plugins/super-forms/uploads/php/files/42d35c66e49fcb192a015b415a6038a2/zilusal.pdf
    • http://matstravel.ru/userfiles/file/9113920100.pdf
    • https://przyklejki.pl/userfiles/zupukogipukuzit.pdf
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/86aa9d7ec2135c350336002cb3c226f7/72489544394.pdf
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3c4acbc0be---17780990495.pdf
    • http://dogable.de/userfiles/file/dajinedutuxebumubokonebe.pdf
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160983e8d63034---wejixulejuliwagu.pdf
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608650e0eeb14---89664511546.pdf
    • https://performanceltg.com/wp-content/plugins/super-forms/uploads/php/files/c59480d01d8c8d81fc6561b42d6391ca/xezuradiziji.pdf
    • http://elesi.eu/fichiers/files/milupulakade.pdf
    • http://timeyear-v.com/userfiles/file/woletimowekujil.pdf
    • http://tumwebthailand.com/ckfinder/userfiles/files/35648967641.pdf
    • https://mcq-exambd.com/app/webroot/ckfinder/userfiles/files/zuzadofoxakevovob.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=north+and+south+america+capitals
    • 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_off0000fd45.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFD45 16792 bytes
font_01_sfnt_off00011557.bin
e694dab9a7b93007697ab0d74b695b345a289b50437aff0196b365831513c9b7
pdf-font-stream PDF embedded font (sfnt) at offset 0x11557 16656 bytes
font_02_sfnt_off00014050.bin
3c7ccc71529093ff3c29f36f187f71cc19f17d871f7fe80fe00257c40e47396b
pdf-font-stream PDF embedded font (sfnt) at offset 0x14050 10856 bytes