Malicious PDF — malware analysis report

Static analysis result for SHA-256 e65ee120a13317fe…

MALICIOUS

PDF

96.3 KB Created: 2021-06-30 19:47:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 26671a48a4f3e46cc7c2f777992d50d1 SHA-1: fbc5841fbc63860cec27897d0c36f0f291f8350b SHA-256: e65ee120a13317fe6dcdb328b1a31bc331fa0612aa17569af49f8f52927c6b48
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of links pointing to compromised WordPress sites, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and link farm heuristic point towards an attempt to lure users to external malicious resources, potentially leveraging embedded JavaScript for exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9895

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 http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4c548e944d---2130868031.pdf
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/fedba029fac42d1b6ecbe3e23ee1aa04/46865747437.pdf
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609057feb27f4---67445744176.pdf
    • https://www.dartmusicfestival.co.uk/wp-content/plugins/super-forms/uploads/php/files/306987e037d7e81dd1e0e02ecac7e78e/55174194225.pdf
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bcb1598289b---74143226191.pdf
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/16094d1d6be965---55095158809.pdf
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607b4ceb54ade---kiwodu.pdf
    • http://www.marcelasemper.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081d7206fe42---81983580002.pdf
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160daee8c38c36---feruraset.pdf
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1925b28458---mabejijegafufuvesewawodup.pdf
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/9sllqgrqalie8ied79v9tcfp34/kolij.pdf
    • http://arablift.net/userfiles/file/11910027745.pdf
    • https://nevisnews.com/userfiles/bufusolurafati.pdf
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/4ee7997b100e2bf4222e562a8e8bbd2f/netomuxa.pdf
    • http://akcjonariusz.com/UserFiles/file/52880782653.pdf
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e43a85afb6---wipulofumavala.pdf
    • http://maility.pl/_ADRESuserfiles/file/39735462488.pdf
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b28427967c2---nipolaritup.pdf
    • http://coumert.com/images/file/79980979948.pdf
    • http://intestinalfortitude.org/clients/0/0c/0cf504f131cb0201443a7bd449519f4a/File/98992034510.pdf
    • http://etcad.net/np/upfile/file/suridodijoted.pdf
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/ppg1m0hqu4cd0en0lseaks1vb2/76462086632.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=meaning+of+tch+tch
    • 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0001559f.bin
d9f5e66163d907df9b2c2f031b8906ab183602eda4757f3e8ef428a9cf922d60
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1559F 18328 bytes
font_00_sfnt_off0000dfcc.bin
a8161c2f5ba9235eb51b4fcc43b6bb219725019365cb8d38f9ec25dfe5ce54ff
pdf-font-stream PDF embedded font (sfnt) at offset 0xDFCC 3464 bytes
font_01_sfnt_off0000ed4c.bin
536fa9081a0b47ab2730705fd8e4130f403128c4aa5de399d3a5feba36ad20d4
pdf-font-stream PDF embedded font (sfnt) at offset 0xED4C 10292 bytes
font_02_sfnt_off0001046b.bin
5c15e166685ff84d32856d9215624f4fc6487b40b3354073f9abf91755dd7fb3
pdf-font-stream PDF embedded font (sfnt) at offset 0x1046B 23016 bytes
font_03_sfnt_off00013d8e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13D8E 16792 bytes