Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab30424db50993a7…

MALICIOUS

PDF

84.5 KB Created: 2021-09-03 03:45:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: e97672271f2819e23e232114abe4530a SHA-1: a1b11d829f2ac9caa0a21dde34605dbd7548d3b7 SHA-256: ab30424db50993a76fef9db4c976888a7c1b85cc71207016f1c74153bb0564d9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm with numerous external URIs, many pointing to compromised WordPress sites or disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate this file is likely part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://ketchas.ru/uplcv?utm_term=speed+control+dc+shunt+motor+pdf PDF link annotation
    • http://dansensvenner.dk/imagesfile///9682537983.pdfIn PDF document text
    • https://iescolumbus.org/wp-content/plugins/super-forms/uploads/php/files/4ff4cbaa299a3b25ba8684b2821b7af3/sutovatatiso.pdfIn PDF document text
    • https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/a627b096ded973cfd6d3a689b358bdcc/keraxotovitumemaz.pdfIn PDF document text
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/e4bd8337ba9c01ea5ba8105d7655d73b/sokexupexugirojuxavu.pdfIn PDF document text
    • https://www.zulilighting.com/wp-content/plugins/super-forms/uploads/php/files/c2f400100a60743252f51b8c71529a8f/jigokikifipixubinomudi.pdfIn PDF document text
    • https://www.sesc.com.ua/wp-content/plugins/super-forms/uploads/php/files/co4qr34e96ll9olnajaqvmvt77/giwerosod.pdfIn PDF document text
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/a70dd1c9b246930f3c9b0452a1a7684b/13892901195.pdfIn PDF document text
    • http://adaviestransportltd.com/userfiles/file/47441206720.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609d472523b89---rezegopuvuma.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/16112d0e9c3ea2---gunam.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbef796cd1---66729457566.pdfIn PDF document text
    • http://abwingsmd.com/uploads/files/fudemolomabipokam.pdfIn PDF document text
    • http://salamino.pl/userfiles/file/97103693250.pdfIn PDF document text
    • https://bahamianbrewery.com/ckfinder/userfiles/files/besoparalaguwixi.pdfIn PDF document text
    • https://tavcam.com/upload/ckfinder/files/reguwobezizi.pdfIn PDF document text
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/d693b229e48be7da0a3b0e10abf5d8a3/61765286142.pdfIn PDF document text
    • http://reszke.pl/fckeditor/editor/filemanager/connectors/php/file/69128978263.pdfIn PDF document text
    • http://giasuthienphuc.com/Images_upload/files/voworabufalix.pdfIn PDF document text
    • http://cosmik-kinoteatr.ru/sadm_files/42711429269.pdfIn PDF document text
    • http://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/16100eebb48f08---89860704906.pdfIn PDF document text
    • http://westernmaki.com/uploads/files/86959332719.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab6a7070d67---60056588563.pdfIn PDF document text
    • http://s2ipower.com/survey/userfiles/files/fevilub.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_off0000e45f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE45F 10804 bytes
SHA-256: 67c876e458f9765b19d9113c740495e5cb146f9120f8111c3e021fabbc7da307
font_01_sfnt_off0000fd04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD04 18480 bytes
SHA-256: 2febd90828944826ddb367980e8bbeb0a204c8dcb3ad3a27f8a3ae15b5d0a570
font_02_sfnt_off00012c6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C6D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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