Malicious PDF — malware analysis report

Static analysis result for SHA-256 190b8d36c7ddb906…

MALICIOUS

PDF

97.5 KB Created: 2021-08-07 10:17:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: d51d471c07be4f68ef4e68780a37d7ef SHA-1: b198267a13223d07ccfcdaef9ca3824f02124b0b SHA-256: 190b8d36c7ddb906f8757c86f3db3388ce9e739f70fb1c23672c448739b624fb
164 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to compromised CMS upload storage and disposable hosting, likely to distribute malware. The presence of a 'download' button lure further supports a phishing or social engineering attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://oniceh.ru/uplcv?utm_term=how+to+randomize+pokemon+ultra+sun+no+computer PDF link annotation
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/696de9d6524a72974e10c5bcb7c38557/11318833786.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8438b3de6b---diduveleguxefusez.pdfIn PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/sr0r74n1cvvspoth839602js8u/4948934518.pdfIn PDF document text
    • http://megalabsrl.it/userfiles/files/46659748721.pdfIn PDF document text
    • http://waterlootour.com/FileData/ckfinder/files/20210623_22D725F050498C76.pdfIn PDF document text
    • https://bachson.net/upload/file/zezufag.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ddff58ccc1f---14088618781.pdfIn PDF document text
    • http://ixtvs.de/_upload_bilder/_filemanager/file/gozojojiz.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/161099076b1c98---27624505899.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac3055a680f---rugofusujekolowepavu.pdfIn PDF document text
    • http://nature-revive.org/files/file/leguzapofesegiximegugipuj.pdfIn PDF document text
    • https://ihotel2b.com/upfiles/editor/files/xelixutesirawewegoni.pdfIn PDF document text
    • http://longarmacademy.net/fckeditor/userfiles/file/87637152596.pdfIn PDF document text
    • https://vinisfarm.com/wp-content/plugins/super-forms/uploads/php/files/accec9888e989f0db209f4380b7f6ad9/6631094888.pdfIn PDF document text
    • https://www.channeloflove.com/ckfinder/userfiles/files/14100260868.pdfIn PDF document text
    • https://sellerflows.com/wp-content/plugins/super-forms/uploads/php/files/95b2b4c04062661ba20cbf2fe8240c1b/ruxoxizofofamuvikak.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/db342cf5aca2f6b0c1141a87ca1d8315/jatebojekosikejojagu.pdfIn PDF document text
    • https://ratsimae.ee/media/contents/file/60155087632.pdfIn PDF document text
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9c8e07a65---22114927626.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099ad19798cc---67234067885.pdfIn PDF document text
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/d02fb2f62de20b13683f1413902ccf80/sesodotiliwijuwasa.pdfIn PDF document text
    • http://staractivecollection.com/resimler/site/files/xoxawosuduzagovib.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/ec1045d7elp4muiet0dsvavep4/duwububerovekiwiliruv.pdfIn PDF document text
    • http://abwcoliseum.com/uploads/files/47610297505.pdfIn PDF document text
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/oe3qn667n9sgim826fo96l06d0/68825506397.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/601ea852dc94346f2bacb8de34ea7f96/kutadu.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_off000115c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115C4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012dd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DD6 18372 bytes
SHA-256: 10a6a4aa70da426c162dd9a11d97bdd6ad3544025b0d58acb0ef02b74b63051e
font_02_sfnt_off00015d8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15D8E 11004 bytes
SHA-256: 5b5487908c865207f27f06678cbfd7c652271e0038115c96a84ac7c0acb9ea52

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