Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2e11d35de806ea6…

MALICIOUS

PDF

89.1 KB Created: 2021-06-29 12:37:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 41433411dba39aa5f2bb6054c55c7f83 SHA-1: 17490907c314d3ba44ecc8346f7469c5f03a2413 SHA-256: e2e11d35de806ea695762cbae1ae372b7f64d431ea650c48d859349cdeb9484a
216 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised WordPress installations or disposable domains, indicating a link farm designed to redirect users. The heuristic 'SE_ADVANCE_FEE_SCAM_LURE' strongly suggests the document's content is intended to deceive users into believing they are owed money or a prize, a common tactic in advance-fee fraud. The ML classifier and ClamAV detection further support the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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 http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/1607693a50eca5---74082324461.pdf
    • https://vidolamerica.org/wp-content/plugins/super-forms/uploads/php/files/2a0e38cfa03dbbd4cd4e43ec717eb60f/kozigovibi.pdf
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/16075265b20b98---5460897783.pdf
    • http://technocom.pl/editor/file/54168091100.pdf
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/58bf3803c049aee2a625731824e6636c/fuwazenagezek.pdf
    • http://flexa.cz/docs/file/fovenetigorof.pdf
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd3784935db---49029804976.pdf
    • http://elsekmont.eu/userfiles/file/86458383982.pdf
    • https://bravo-hk.com/userfiles/file/tejeperoxel.pdf
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a6af239297a---95796914524.pdf
    • https://pypconsultores.mx/userfiles/file/nikenina.pdf
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e053de3054---fizig.pdf
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c677cb6fcba---72755181623.pdf
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/160ceb91c85a2e---84433172485.pdf
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cb0bc0574fd---melirudegalix.pdf
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a49db65596---74804316452.pdf
    • https://jgmurphy.com/wp-content/plugins/super-forms/uploads/php/files/00ee5344d070dfe78405f3f0e2ed3fa0/76619241705.pdf
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/059555864c0f8c4ab895e60018495114/77125834683.pdf
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d4012412919---dewinaganadubifavigosa.pdf
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/16077ddcae4b73---peribebufosa.pdf
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/0d75afaf2c240a6d453f5c0290604e18/25243139113.pdf
    • http://cheers-gifts.com/userfiles/40667795232.pdf
    • http://huntland.hu/upload/file/35340575718.pdf
    • http://mousike.it/img_ins/files/vaweno.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=florida+state+unclaimed+property+search
    • 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_off0000fa1d.bin
9515cf0a2a548782f7a811edf851071c1acb2e4da259c1b9416dd7c3c7ae3443		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA1D 16904 bytes
font_01_sfnt_off0001259e.bin
08bb83555d6bf74520a8be882972a4d7807a57231625e8f8d9e564d80f3cdd34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1259E 10968 bytes
font_02_sfnt_off00013ede.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13EDE 16792 bytes

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