Malicious PDF — malware analysis report

Static analysis result for SHA-256 be430b368207f0d5…

MALICIOUS

PDF

80.0 KB Created: 2021-09-12 20:49:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: bdeedee7de161abe6d4712fbccd9f10d SHA-1: a3699a3ce715a616d936523f94c042334f802873 SHA-256: be430b368207f0d5e7ce4a86593cb28821bce26b8aa8e7a6e710685d41109097
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm or phishing lure. The presence of external URIs and the overall structure indicate an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9764

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://alsharqcc.com/userfiles/files/mejosazafuzonamezevez.pdf In PDF document text
    • http://stlukesfp.org/ckfinder/userfiles/files/93858434619.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1613bbb9547280---xubafibiriru.pdfIn PDF document text
    • http://mybyblos.com/userfiles/file/59844016594.pdfIn PDF document text
    • http://xn--80aadq3ae7aa5k.xn--p1ai/upload/file/75113323060.pdfIn PDF document text
    • http://chip-chup.hu/upload/file/zopuzulekenoruzozazosepot.pdfIn PDF document text
    • http://roocenter.ru/upload/file/gukokidutaribokuboruwaji.pdfIn PDF document text
    • http://www.physedu.in/newsite/userfiles/files/94818913301.pdfIn PDF document text
    • http://mdbim.pl/ubezpiecz/obrazy/file/14183675058.pdfIn PDF document text
    • http://kanalizace-ul.cz/userfiles/file/mofodedogoga.pdfIn PDF document text
    • http://viral-list-machine.com/ckfinder/userfiles/publics/files/vofupiloxezugivorusozu.pdfIn PDF document text
    • https://momentous-inst.com/uploads/image/files/34786487045.pdfIn PDF document text
    • http://onfireinteriors.com/userfiles/1222082904.pdfIn PDF document text
    • https://globalcareerclub.com/FCKeditor/userfiles/file/jaredotiguxasalaxosug.pdfIn PDF document text
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16130e85969db8---76972448760.pdfIn PDF document text
    • https://happy-playground.gr/uploads/_uploads/files/jurerit.pdfIn PDF document text
    • https://kakakmanis.com/contents/files/56133662142.pdfIn PDF document text
    • https://onecre.com/images/content/files/65835260004.pdfIn PDF document text
    • http://platcometals.com/images/file/gudafazafulijizogofunoruw.pdfIn PDF document text
    • http://tecniagua.es/uploads/ckfinder/files/45041177850.pdfIn PDF document text
    • https://angkorphotographyguide.com/userfiles/file/minawiwu.pdfIn PDF document text
    • http://xn--franzsischebulldoggen-lec.eu/userfiles/file/pufovuxogixutiledetupabop.pdfIn PDF document text
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/jdadre86tnoi2e9k9si3t4saiu/85874824040.pdfIn PDF document text
    • https://embassyinvietnam.com/webroot/img/files/xukazatuxil.pdfIn PDF document text
    • http://totoumi.jp/upload/file/belozijonezivojuxigonelu.pdfIn PDF document text
    • http://magyaringatlanadatbazis.hu/dev/_user/file/68927359221.pdfIn PDF document text
    • https://jackinthegymtpe.com/uploads/files/202109110450223425.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=minecraft+pocket+edition+0.16+apkPDF 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_off0000bafd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAFD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d30f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD30F 17404 bytes
SHA-256: d171e14c4fd1351f634aa03341ba3128adaacc0b62c3755f30a5994e789992ec
font_02_sfnt_off0000ff31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF31 16616 bytes
SHA-256: 06f1d5f5a9083a80364da0885936c8ddb2848b41a67694407b5e75bff462a068
font_03_sfnt_off00011679.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11679 10892 bytes
SHA-256: 52963bd7d86b69fdb41a868e0a488af64fddb09f33b0d36ffb7c233fa98afea7

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