Malicious PDF — malware analysis report

Static analysis result for SHA-256 a220e682d661402a…

MALICIOUS

PDF

100.7 KB Created: 2021-08-09 07:15:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 9530bf9d7ae19f7168c7b29f7362e5b2 SHA-1: 56fce2397bce13a7bdbcd09f4399b9af680369d4 SHA-256: a220e682d661402adb18995560b5e7c090992712dab5488a346e2afc43c1998d
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://archism.ru/uplcv?utm_term=naruto+shippuden+ultimate+ninja+storm+revolution+cheats+unlock+all+characters PDF link annotation
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/16079c6386230a---89901232083.pdfIn PDF document text
    • http://lpkgoodframeupvc.com/userfiles/files/dubarivajapumebik.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e4b87c279d---sojunuzutivezot.pdfIn PDF document text
    • https://hideab.se/tc/Mediagalleri/file/34115704899.pdfIn PDF document text
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/74d204c2278d1ba0cd63bdf8cbb189b6/xamepijumekofifaz.pdfIn PDF document text
    • https://eviinstall.com/userfiles/files/30157499134.pdfIn PDF document text
    • https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/2mgidue92tru517nc7nf5grbdq/jajupadepezinasoj.pdfIn PDF document text
    • https://holyfamilyhospitals.com/ckfinder/userfiles/files/butazulular.pdfIn PDF document text
    • http://tutek.eu/userfiles/file/xawumetezusujixami.pdfIn PDF document text
    • http://phpirateboosters.com/clients/867602/File/zilozogoxutudaner.pdfIn PDF document text
    • http://clinicaveterinariailmarzocco.it/userfiles/files/39667336624.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/b12fd92ca235da305a26591035679dbe/pitagesar.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/16095cd2b9d926---42525728279.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087fc4a34ed0---demovale.pdfIn PDF document text
    • http://davisfolk.net/clients/1/1f/1f1070e31f35868a9a13f38ee7dc887f/File/32425256883.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/2ea54e637db876a95729dfb3b16e1d0e/mudewa.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aba39a57605---54038775597.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/3fa6f9e99dacb546be454deeadda1638/zonatokavowunidupesut.pdfIn PDF document text
    • https://ruta.hu/ckfinder/userfiles/files/99684902970.pdfIn PDF document text
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/vtu6pim8os9lvilk3rd6f0rt6e/69285185511.pdfIn PDF document text
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5b5ca6a3c5---jusini.pdfIn PDF document text
    • http://humanlitech.com/files/files/wawikuvotiv.pdfIn PDF document text
    • https://cgeminfos.ma/upload/file/53891939259.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000110b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110B1 18724 bytes
SHA-256: 1857ad82df7cfd350b0dff7b9145deb3d34dda29f86c7b71b7add5ab331af890
font_01_sfnt_off000141d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141D5 11144 bytes
SHA-256: 8e851e14e73624eb7a34a117256758d5dcff8b6713dca08e25049291269c34e4
font_02_sfnt_off00015bae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15BAE 3748 bytes
SHA-256: 20b90c51521dee44d8380d25dd6c871a770dfbb834c7b4c561e241fb3d6b8354
font_03_sfnt_off00016ac0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16AC0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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