Malicious PDF — malware analysis report

Static analysis result for SHA-256 06e3524bbe396195…

MALICIOUS

PDF

90.5 KB Created: 2021-08-10 00:25:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 0285ceb47185006b9532c29f8f442acb SHA-1: 6b8cba9a6b76aba3396921322cc288306e90cd60 SHA-256: 06e3524bbe396195fea34efeb13d070d8e69b30715f27949c6c6991aa43e4e73
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm or phishing lure. While no scripts were explicitly extracted, the nature of the links and the PDF format suggest potential for embedding malicious JavaScript or exploiting PDF vulnerabilities to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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://isystemlab.com/admin/ckfinder/userfiles/files/53735972149.pdf In PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6c1e0c09ed---48308499144.pdfIn PDF document text
    • http://mrspk.com/ckfinder/userfiles/files/99039040001.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/92913959d16ad848fb7b6c5bc5110be7/31998135215.pdfIn PDF document text
    • http://regimhotelierbucuresti.com/images/userfiles/dosazuzuvogurufepewadij.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/6935033f5b8c3972876c156f0d0c26d6/74982170834.pdfIn PDF document text
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/hhroi4rv3ggmcjmp6ctrb7um67/12404999646.pdfIn PDF document text
    • https://orangcar.com/app/webroot/upload/files/20675944529.pdfIn PDF document text
    • http://duetsepolno.pl/userfiles/file/14582902132.pdfIn PDF document text
    • http://ecovn.vn/uploads/news_file/pevuvafokawotigobevezugo.pdfIn PDF document text
    • http://geometracosentino.com/userfiles/files/27555941491.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/newumelugularijita.pdfIn PDF document text
    • http://firmen-bekleidung.at/userfiles/file/givixokepexa.pdfIn PDF document text
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/kk57idli9hevo7ieuah027dtke/99524732748.pdfIn PDF document text
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ceb9bab2d9b---gidirozojanabutanodaxig.pdfIn PDF document text
    • http://boschvietnam.com/files/usersfiles/files/64042589201.pdfIn PDF document text
    • https://study-go.info/wp-content/plugins/super-forms/uploads/php/files/c240626fa887e562b4f005c2e68c7af5/45786497999.pdfIn PDF document text
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/f169648aad960e3071d7c3c85a7a078f/53906437944.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ca84cde276---14862857796.pdfIn PDF document text
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/vtt3brf1ptfs62slrlc32veom6/31418871613.pdfIn PDF document text
    • http://reicar.dk/userfiles/file/61969336211.pdfIn PDF document text
    • http://transcash.com/ci/userfiles/files/75957231679.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073c58609eca---22143034381.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=bajirao+mastani+movie+video+songs+download+pagalworldPDF 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

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e528.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE528 16164 bytes
SHA-256: fd494554c7a7a2c4488382a78096c535ff133766c7221992be4f6a58596b2467
font_01_sfnt_off0000fa9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA9F 11068 bytes
SHA-256: 1a8c4008bb38a8d670b07ab4ccc7a91d3e2f4eb0d713124bb00c70a642871f61
font_02_sfnt_off00011432.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11432 17628 bytes
SHA-256: 7b290c0deade22b6bb5f9be2466589508461272334d2a01dcc7a997bb1bfac83
font_03_sfnt_off000142a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142A8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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