Malicious PDF — malware analysis report

Static analysis result for SHA-256 f97297843ab63652…

MALICIOUS

PDF

87.0 KB Created: 2021-07-15 17:43:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 658230fcf17d42966999a2a5d3cc3872 SHA-1: cd886073e8aeb7bca75638174eb72a08905c3ac9 SHA-256: f97297843ab63652e964beed88fe0881a280b3930b61c24c4e10843c745e6bda
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The presence of external URIs and link farms points towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/73632130707d99ba1462d55f0db31a4f/surisuteronavosavina.pdf
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c72123e4f48---lunuxigoru.pdf
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7f7951090---dizafoxoxilibefajox.pdf
    • https://area5srl.it/file/7189978276.pdf
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c6eb351cfc3---goxakubixuv.pdf
    • http://pvsystreports.com/wp-content/plugins/super-forms/uploads/php/files/dif80msldfu5bcimbq3p4bdne6/18797100187.pdf
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/e6e125ce6cb02dab8969f8b08ec7200f/378232085.pdf
    • http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bdfc369777---vawagokejigenilolumego.pdf
    • https://zop.bg/webroot/img/content/files/39542205696.pdf
    • https://betenrealestate.com/sites/default/files/file/wotaxutut.pdf
    • https://www.sadcmedia.com/wp-content/plugins/super-forms/uploads/php/files/qnmr93158eadtok8l1al7r3rud/5329887597.pdf
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8ab492669b---25215770935.pdf
    • https://www.brightfieldbusinesshub.co.uk/wp-content/plugins/super-forms/uploads/php/files/1jqvleq561o81vovsbfho91n04/95771280737.pdf
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/3ded9fd19932c866e748d1fd73917545/47695730475.pdf
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/ikvcc1tc7ku092ecjr8i2kkjl1/24774038265.pdf
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/035954613a377f923272c9b17bd2f48a/45072487399.pdf
    • https://gamaconsultores.cl/upload/file/kijunegevasepomatajinemu.pdf
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/16080921e0c6e9---foximerive.pdf
    • http://bochosushi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160982e2f5013b---73414899393.pdf
    • https://pmeds.us/userfiles/file/85604422781.pdf
    • http://schokobrunnen.com/idata/texowerepejawuxakod.pdf
    • https://happycolaborativo.com/uploads/files/zofomexijareguluv.pdf
    • http://ascensionchina.com/userfiles/file/2183537723.pdf
    • https://cosalesrep.com/wp-content/plugins/super-forms/uploads/php/files/73d58e3f87b23e098e8e7dc395561cf4/rudepoluguvajufivi.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=japji+sahib+pdf+with+meaning+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_off0000ee64.bin
9af3e1c0fd2defea7ca106c515d9298ca28b4d37c5e57452480299c64972b25c
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE64 11072 bytes
font_01_sfnt_off0001078d.bin
0db9aeb40b9fc9363037238312c1fd2008ba158e8806c3cdcd5943d3f5c013fc
pdf-font-stream PDF embedded font (sfnt) at offset 0x1078D 17932 bytes
font_02_sfnt_off00013663.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13663 16792 bytes