Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfe2b98c90882bae…

MALICIOUS

PDF

82.0 KB Created: 2021-06-28 16:50:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: a64ac203cd659bdd5c88ff513643c449 SHA-1: 8e3167f7693ecd2831f82a3eb341b6a0abf32072 SHA-256: bfe2b98c90882bae5cffbde53b81cdba26488f37cb31508ee2a1ca118533ee34
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. Heuristics indicate the PDF contains a link farm hosted on compromised WordPress sites, likely serving as a lure for phishing or malware distribution. Although no scripts were directly extracted, the nature of the embedded links suggests an attempt to redirect users to malicious destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6d40bb8590---27010210354.pdf In PDF document text
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/160969766c77f6---govowozezuluja.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160756571910a0---newumelusafijuponajorid.pdfIn PDF document text
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607097be84b0d---vifolajofanubolelujo.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d97fbbea59d---39636958153.pdfIn PDF document text
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/m023k8t3roqtmk331r1ijektc4/10557213572.pdfIn PDF document text
    • http://security-m.jp/tool/images/file/jisegisozawojolosip.pdfIn PDF document text
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/b249a877d8456a7c8c71928839c01305/sofok.pdfIn PDF document text
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160803f6b695bb---siwuxiw.pdfIn PDF document text
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/97c7292b64f3bf6e7b17f372819e399d/xidupaku.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608778e48f7e9---38051894529.pdfIn PDF document text
    • http://aaaexpressac.com/userfiles/file/xajuzuzivazodalij.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/160c6ec1935c82---zunataxagiruposabamav.pdfIn PDF document text
    • https://baodinhsolar.com/wp-content/plugins/super-forms/uploads/php/files/4i4a57qtse57ojf6j4momvce9v/59358902840.pdfIn PDF document text
    • http://renovator.cz/files/file/88669631194.pdfIn PDF document text
    • http://fedime.org/imagenes/34539274002.pdfIn PDF document text
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160be82b69f372---pogululifonevifetep.pdfIn PDF document text
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/f01a00865d1bade7987946116ece534c/vuxiziderexu.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16088ff2c7fe19---92147876056.pdfIn PDF document text
    • https://bnbcostaverde.it/userfiles/file/rimepitepanodol.pdfIn PDF document text
    • https://alatheir.com/atheirwsfiles/file/80205320288.pdfIn PDF document text
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/euuv4cdf08619m8q2s6qfum4ci/9829085558.pdfIn PDF document text
    • https://xanbiente.de/userfiles/file/41654513211.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=auxiliary+liver+transplantPDF link annotation
    • https://medlineplus.gov/livertransplantation.htmlIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e084.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE084 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f89b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF89B 10488 bytes
SHA-256: be450a36fe39ddefd7a062f141f5c4fd1c08888768c4eebfe66167f3740847a3
font_02_sfnt_off000110a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110A0 16300 bytes
SHA-256: 83248f3159183e43c2e188e6612dea1bb916729465733b95968562403ae74515

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