Malicious PDF — malware analysis report

Static analysis result for SHA-256 56f06c9a9fb606bc…

MALICIOUS

PDF

81.4 KB Created: 2021-07-06 14:44:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c9ce4782fd605cb1152f6841a439ce29 SHA-1: 142e85d28e338b54e57ee7d5b26147867140ec11 SHA-256: 56f06c9a9fb606bc4c39348d093cf8c16132248f6fba618ef01f4cee7f573b27
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file exhibits malicious characteristics, including linking to a farm of compromised WordPress upload storage and other disposable hosting domains, likely to serve further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 7

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://samavetpharm.com/userfiles/files/67499298698.pdf
    • https://fullhousetourism.com/UploadFiles/file/20210518193827170.pdf
    • https://doctornhospital.com/banglanews24/editorsfiles/files/toroverujazosijezo.pdf
    • http://beetsom.com/PROGRAM_FCKeditor_UserFiles/file/34782074860a511c83fb06.pdf
    • http://artistalexanderkanevskyroyalshakespeareglobetheatrelondon.com/clientMedia/file/webuzoruvomivakefebi.pdf
    • http://lucann.com/Upload/file/53731281478.pdf
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/1607bcd0d72940---36581871783.pdf
    • http://thementalhealthadvocates.org/files/userfiles/file/pubelotefewasufon.pdf
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/1016be08cf83280baf67ed670197557c/82500686904.pdf
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fb0edd9544---podagavobafifevez.pdf
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160b7530d8d3a6---kujefizabavepanugegi.pdf
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606f477f70e89---manopegojonexutajelulabiv.pdf
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f004a8ebd5---gukikotitinij.pdf
    • http://techscreening.com/userfiles/files/14018659821.pdf
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609014fd4d6c7---6610448861.pdf
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a46d281016a---16111226753.pdf
    • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/20403a2f7c6555dbcf8d6f75a0115b2d/xegarev.pdf
    • https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/lb4lsuc33teekbrbc76s23tak8/31323326390.pdf
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/8pmunss6nlpp8jk52hnm20mea6/30965160865.pdf
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/16099edbbb4974---wutimapavotewirezot.pdf
    • http://barsugo.com/ckfinder/userfiles/files/80297861641.pdf
    • https://k2salight.com/wp-content/plugins/super-forms/uploads/php/files/e409260da157ba5caefe2d141636c555/namiru.pdf
    • https://askopenko.com/wp-content/plugins/super-forms/uploads/php/files/7bafe199b2f6f151e445f320bbc0c5d3/3059086323.pdf
    • https://www.alpha-dynamics.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1607ec9d78c4f2---23676638362.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=electrical+trade+test+questions+and+answers+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_off0000d85b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD85B 16792 bytes
font_01_sfnt_off0000f072.bin
ce79b73fca962c090a9fce4d8563673a6f708b541dd5721076e940da734365f9
pdf-font-stream PDF embedded font (sfnt) at offset 0xF072 10928 bytes
font_02_sfnt_off000109b3.bin
2fdbad5113d79e98519797c95122b75303f520623f5c79163386f665a18eb363
pdf-font-stream PDF embedded font (sfnt) at offset 0x109B3 17540 bytes