Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b22e5e4a56d6de3…

MALICIOUS

PDF

77.5 KB Created: 2021-06-28 00:38:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 8586e750110de4a42c5c86122f90a505 SHA-1: 79df3eb9140ac58a09aed405ce9be52f8825a9fa SHA-256: 7b22e5e4a56d6de3f49c52ae5668855721c0a3e41d8ebebd3877b1f2134986a6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains numerous external links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://smidgel.ru/uplcv?utm_term=answer+these+questions+and+then+ask+your+friends+and+your+family PDF link annotation
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/b7873fd4bfeb570f87f611bcd01ad5fd/44147062150.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607c74c425bd5---tanefoxelupazopo.pdfIn PDF document text
    • https://webupdate.ca/wp-content/plugins/super-forms/uploads/php/files/cv1lqaifr8mgrkngqfdqag4tbj/54718076258.pdfIn PDF document text
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a38270ad5f7---navojojogirevenoxogevajaw.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/c22c5442528b5ad92f3c9b2f287d9677/26684419874.pdfIn PDF document text
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/a875aff5b675611944c24cb2ddce8eb0/99824959717.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160942f305b435---sidozepuzuwugiw.pdfIn PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160b45a43923b4---lifafegomuwo.pdfIn PDF document text
    • https://weblative.com/wp-content/plugins/super-forms/uploads/php/files/h4aipt1l7ulgt91ubkel1fjm6v/fifobibogofopalura.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/77020a9c8143364e08120fae761b3145/vonukowiwonixas.pdfIn PDF document text
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/aa08efc34be25532e0cf65b8c492bfb0/fikunejupavovenofiwegeso.pdfIn PDF document text
    • https://taevlingar.se/images/pages/file/74939633980.pdfIn PDF document text
    • https://misionesmedellin2030.com/wp-content/plugins/super-forms/uploads/php/files/e1k7u5mvg178f8ofna63v9iotm/95488850808.pdfIn PDF document text
    • http://hzjksj.com/images/upload/File/pazawoxezixo.pdfIn PDF document text
    • http://beamstraffic.ae/amb/userfiles/file/36592654992.pdfIn PDF document text
    • http://karmand24.ir/basefile/ehotel724ir/files/tuzixixegabedi.pdfIn PDF document text
    • https://www.sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/160849a9159053---webakovemaniwakodov.pdfIn PDF document text
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/hq68k5d10mmtetc5lo30agf41g/pukadij.pdfIn PDF document text
    • http://djarkitek.com/temp/vinney/HTML/userfiles/file/2082778298.pdfIn PDF document text
    • https://mkting.com.co/wp-content/plugins/super-forms/uploads/php/files/a1cc956bd5ad3bf8ec1445cd6f57f8d1/53864410446.pdfIn PDF document text
    • http://www.anieliasfx.com/uploads/textareas/file/79205283004.pdfIn PDF document text
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16088458487547---74339610126.pdfIn PDF document text
    • https://people11people.com/uploads/File/josureborezosenas.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_off0000caa9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAA9 16384 bytes
SHA-256: d33cd27934c6a13fd7d3389a6bbba7eb08cfe42c2196589727a1fb187705a72d
font_01_sfnt_off0000f479.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF479 11136 bytes
SHA-256: 7fdcee1b664ee5b6769d7a9e782a08320b9102329e5e74860edc82b047e86fa1
font_02_sfnt_off00010e2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E2F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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