Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bbe9f02ab9acd78…

MALICIOUS

PDF

102.8 KB Created: 2021-09-07 02:52:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 6c41c2d09921f2f9767fab6f1da96660 SHA-1: 3d5ed1a334ab5b9d237351ff8c87664452df286a SHA-256: 5bbe9f02ab9acd789f3484f14f8465b311947bb07589a468a22f0f0596e58d46
156 Risk Score

Malware Insights

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

The PDF contains a link farm designed to direct users to various websites, some of which are hosted on compromised CMS uploads. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The document body is heavily obfuscated and does not provide clear textual lures, but the presence of numerous external links points to a drive-by download or phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://makiriaszto.hu/ckfinder/userfiles/files/25431941303.pdf In PDF document text
    • http://hide-bo.com/img/tmp/file/80349643054.pdfIn PDF document text
    • http://cosmeticdermatologymiamibeach.com/uploads/data/files/47091909739.pdfIn PDF document text
    • http://yomamasushitogo.com/uploads/files/65414884410.pdfIn PDF document text
    • http://ophirtonhotel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16113806457f81---83902134378.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/gilepujikugonuranave.pdfIn PDF document text
    • http://globeksa.com/ckfinder/userfiles/files/330869556.pdfIn PDF document text
    • http://besttailor.info/ckfinder/userfiles/files/89551484380.pdfIn PDF document text
    • https://nakipoglugroup.com/upload/ckfinder/files/walukujasodugewupulisax.pdfIn PDF document text
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/a1f31ec4dd3d386927229d6920e47fb6/ditotafosinedamefuxof.pdfIn PDF document text
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/032214ee4a1865e77b68bb4299c82a19/tejifevuxojovezuwasow.pdfIn PDF document text
    • https://www.sterlingsez.com/ckfinder/userfiles/files/garavuduposewuzifuzetor.pdfIn PDF document text
    • https://superchills.com/userfiles/file/rafulejekuzefuvoxedoku.pdfIn PDF document text
    • https://hiampelectric.com/wp-content/plugins/super-forms/uploads/php/files/a89768c950b93b67121b49cba7aba637/45315671351.pdfIn PDF document text
    • http://kramnyca.info/img/upload/editor/file/74611035250.pdfIn PDF document text
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609b7a784c0fb---nidolunedemukupazuf.pdfIn PDF document text
    • http://xlpe.net/Images_upload/files/pazupegutorimurijuvimotes.pdfIn PDF document text
    • https://upbilbao.com/ckfinder/userfiles/files/31615256978.pdfIn PDF document text
    • http://albertopizzetti.it/userfiles/files/42585103191.pdfIn PDF document text
    • http://robbinsfamilyhealthcare.com/clients/2/2c/2c787fa606fc56c3a3a24dfc5409695f/File/gemaxureden.pdfIn PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d4d26893b8---pivutokisepored.pdfIn PDF document text
    • https://laplacedesstores.com/upload/file/mirom.pdfIn PDF document text
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/37cf1c11e3df5fd055926591ea26f0b6/11344824765.pdfIn PDF document text
    • http://jagatjyotischool.org/jagatjyotischool/userfiles/file/15278909171.pdfIn PDF document text
    • https://www.reachcast.ca/wp-content/plugins/super-forms/uploads/php/files/15d34308b40454b66d09fb6dbd21a530/zifupomudusewir.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=geotech+engineering+pdf+notesPDF link annotation
    • 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012dbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DBD 10732 bytes
SHA-256: 0b42d37868b928a80f2966243ff6a7f0b308b2cd445b0376725746ef92719b82
font_01_sfnt_off00014625.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14625 18056 bytes
SHA-256: 2c804fcad13513e4eb311b383234c74f07ec7f34d15c7a4c8dd804753ae7bcda
font_02_sfnt_off0001757a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1757A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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