Malicious PDF — malware analysis report

Static analysis result for SHA-256 1044419c3d1f5f75…

MALICIOUS

PDF

86.7 KB Created: 2021-07-13 18:30:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 6d3f5dca6d2a5d6c1e0cc3aed56f5f8b SHA-1: 6f3d710134deca9ec641e447098d7d024cd39460 SHA-256: 1044419c3d1f5f75404c805e1e330986c1c0bf192eabb5ff8c3e3dd3013e10b0
156 Risk Score

Malware Insights

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

The sample was detected by ML classifiers and ClamAV as a malicious PDF. It contains numerous links, many pointing to compromised WordPress upload directories, suggesting it's part of a link farm designed to redirect users to malicious sites. The PDF's structure and link farm characteristics indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://feach.ie/images/uploads/file/9328131854.pdf In PDF document text
    • https://www.lightingdynamics.com/wp-content/plugins/super-forms/uploads/php/files/76160e70660aee651917c6baf42ef59e/71412956401.pdfIn PDF document text
    • https://seataclightingalaska.com/wp-content/plugins/super-forms/uploads/php/files/046d4bc254f37b27879e378095962d06/darodomedadovoj.pdfIn PDF document text
    • https://anfauglir.com/images/file/zejujawizunovubejotimizon.pdfIn PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a83ee2e2444---repipaxoximupelenobapid.pdfIn PDF document text
    • http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a63a82c9ce5---guliwoladi.pdfIn PDF document text
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606d35f23d2c9---sagit.pdfIn PDF document text
    • https://bednidhitraders.com/userfiles/file/35541649997.pdfIn PDF document text
    • https://cedria.es/DOCUMENTS/FotosFCKEditor/file/furixidusis.pdfIn PDF document text
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/vrqo87afar4a955a2ci7gpkrb0/vigilupagutetoruronavije.pdfIn PDF document text
    • http://healingpawswisconsin.org/clients/a/a9/a991db820639e3552774ed9a746c1e3b/File/feduluruzibesutigu.pdfIn PDF document text
    • http://win-sonic.com/kida2018/ck_imgs/files/nobudifu.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609081ae2b047---71671414849.pdfIn PDF document text
    • https://ambientltg.com/wp-content/plugins/super-forms/uploads/php/files/1762f5a0f76a6824ab15236f8bebe58a/piwanamabozapotimugesibu.pdfIn PDF document text
    • http://learnersdigest.org/userfiles/file/nomebogekexes.pdfIn PDF document text
    • https://allegypttours.net/userfiles/files/suzevenaz.pdfIn PDF document text
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/160877f8409b53---taxitizovakidukisumi.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b271807ad8e---vizidijofemaxelafejuzema.pdfIn PDF document text
    • https://mamo-tato.ro/userfiles/file/13272351267.pdfIn PDF document text
    • http://uekekb.ru/!upload/files/nunidukojuxapagixadubusud.pdfIn PDF document text
    • https://evenimentecastel.ro/wp-content/plugins/super-forms/uploads/php/files/li7e0thvb3t39j2qvgqc5q96lp/dukeru.pdfIn PDF document text
    • http://www.rpv-drachten.nl/files/file/89290381672.pdfIn PDF document text
    • https://ryokanclub.com/FileData/ckfinder/files/20210627_ED754D89C92A09B1.pdfIn PDF document text
    • http://tw-go.org/files/wipavixijonubovubufizi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=overcoming+obstacles+wordPDF 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_off0000ec84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC84 11028 bytes
SHA-256: d31aae69bfdf7d7b7353ad585c79d4a4c0047d9e87da5bff57e53d72d700253f
font_01_sfnt_off0001060c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1060C 18032 bytes
SHA-256: 6bc7a2a91c3d1c1e6b543ac97a3d67ccab2845ea9b31bfb19ad7169b32a71c5e
font_02_sfnt_off000135a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135A3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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