Malicious PDF — malware analysis report

Static analysis result for SHA-256 d79530d8829a4cbe…

MALICIOUS

PDF

89.8 KB Created: 2021-07-01 23:37:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 717170f46288d754fac4ce1333e9e962 SHA-1: 28e24c7da1f85e995ad4ac3aba5a422d65a478fb SHA-256: d79530d8829a4cbef739815a036b5b0fbf7fd0d6e96d78be4a9b1b247f0c0272
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised WordPress sites and other domains, suggesting a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery via embedded links.

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://panificiopasticceriabattaglia.it/file/54263694168.pdf
    • http://kco.su/userfiles/file/fagufata.pdf
    • http://scvumaichiramen.com/uploads/files/jivam.pdf
    • http://newabel.com/ckfinder/userfiles/files/tilifexipaxesizedogof.pdf
    • http://anaminfo.com/attachfile/file/84552603089.pdf
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/f5b01f7444254e75e1f5e3a8c9e8c75b/nakekopigajilijoninelija.pdf
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/7ea9665ea8f38997d40b6ae4e7de3ded/danufisadunuzisodo.pdf
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/ac37ba2de7b51df1cdf3ddf7cccd52db/34182309400.pdf
    • https://scavilecis.it/userfiles/file/99738266429.pdf
    • https://medgarlci.com/wp-content/plugins/super-forms/uploads/php/files/8be2ff23995852a5c64facc3d0c0a514/32843179365.pdf
    • https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/l5vfd9ufkakkulj7lqjp9ieee9/juparodojaba.pdf
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082ae18c6d12---fusajize.pdf
    • https://reflexlighting.com/wp-content/plugins/super-forms/uploads/php/files/2895270854353e1cf24ad0275e7d5a5a/kirofarugeweforesewip.pdf
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac90c12501f---58306324995.pdf
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16096f69b136df---visuw.pdf
    • http://nfc.soo.jp/file/ketabunitogesozuwu.pdf
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/1606ee2eb0fea6---87179782051.pdf
    • http://ajarnveerapong.com/UserFiles/file/16517379270.pdf
    • https://seikico.net/img-tym/files/25452635970.pdf
    • https://earplighting.com/wp-content/plugins/super-forms/uploads/php/files/b68019704f68b4abe2242a316cd136d8/fujogofariduban.pdf
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607d9af1e077d---tiniraxawogonovuro.pdf
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607580e82591c---69545902459.pdf
    • https://www.hamburgeriaagricola.com/wp-content/plugins/super-forms/uploads/php/files/eq61cslrle4vq0kevuao9u3blj/52005682937.pdf
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160cc68075370b---50623277293.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=self+introduction+essay+in+english
    • 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_off0000fc05.bin
492ecb7e7a2fcd97e0eb9ac66aba97a0c28f07432755805db6c6456b87024c5b
pdf-font-stream PDF embedded font (sfnt) at offset 0xFC05 17072 bytes
font_01_sfnt_off0001287b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1287B 16792 bytes
font_02_sfnt_off00014092.bin
6de0a6f977e4cf083345d45d0a72b1bd10711f8b657117760d2c29a3e45c9d0d
pdf-font-stream PDF embedded font (sfnt) at offset 0x14092 11044 bytes