Malicious PDF — malware analysis report

Static analysis result for SHA-256 63002653df142b40…

MALICIOUS

PDF

94.7 KB Created: 2021-07-04 20:07:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: a40dd0883f90e43ef7c386235ca95abd SHA-1: 03f6618714f602778836084a5365b3197fc9490a SHA-256: 63002653df142b40d95ed77727bb79acd3ab46601425fc65a0a9c4c1d505ef0c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous links to external websites, many hosted on compromised WordPress sites or disposable domains, suggesting a link farm used for phishing or distributing further malware. The presence of multiple distinct hosts and the use of UTM parameters in some URLs point towards an SEO-based lure to attract victims.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://huntic.ru/uplcv?utm_term=state+controller%27s+office+unclaimed+money PDF link annotation
    • https://honghow.com/ckfinder/userfiles/files/96193063914.pdfIn PDF document text
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16097e7842a7ec---91440724235.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a70923061b4---66091695081.pdfIn PDF document text
    • http://markone-tools.com/upload/files/sufinafivefubeluwud.pdfIn PDF document text
    • http://abwingssuffolk1.com/uploads/files/80485913167.pdfIn PDF document text
    • https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/358f863b9d0884618fc34b33c9c1c220/lomozikorawafukefevafaj.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607f61d40623a---kitokovelidotasuleduruvez.pdfIn PDF document text
    • http://lbhs1965.com/clients/6/6b/6bdd8f708684a1f547efbf97e1630fe5/File/visagalorek.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/f79c5fbe8a73de5ac6b1221c4acc6497/lilirafasapunawut.pdfIn PDF document text
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9270d04b2e---35937942002.pdfIn PDF document text
    • http://globalquestconsulting.com/userfiles/files/79411718696.pdfIn PDF document text
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b04c1c866f7---nujomopawibufiwerarexa.pdfIn PDF document text
    • http://wabasnb.com/files/fckeditor/file/34308042960a6866a1a9d4.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/kfq8m9nbp60d46j7o9pj1g6vj4/83853783545.pdfIn PDF document text
    • http://geodeslaboratori.eu/userfiles/files/72081489251.pdfIn PDF document text
    • http://giadinhmedia.com/uploads/files/nafafufakaxomojorire.pdfIn PDF document text
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/5ed67049651cb0736a013366cdfbf372/nijilawa.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160d721a54ad37---tusugelejofanararosokem.pdfIn PDF document text
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609d93551f165---wepozenafilol.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4dc7892b88---mapizawevofiborurimusa.pdfIn PDF document text
    • https://thingstodobahrain.net/ckfinder/userfiles/files/16460865662.pdfIn PDF document text
    • https://gelblighting.com/userfiles/files/nokoralukurudodokadubut.pdfIn PDF document text
    • http://wojno-stal.pl/pliki/file/50997400844.pdfIn PDF document text
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/2d0e732bcad040788f67fa7fa4bc3678/24622996895.pdfIn PDF document text
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609735c3d9c1e---nebevofo.pdfIn 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

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_off00010dab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DAB 16892 bytes
SHA-256: 7013059f2af044e21899bcc21e5b130ce96f83efd3d4dff4851b494cf0d0d409
font_01_sfnt_off000139da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139DA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000151f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x151F1 10960 bytes
SHA-256: 1fa2d7696cb71e2c282b6800e1bb752c85d9a0ee6a5e5d677d2d60e298cf6e50

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