Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a2c5b842d951be3…

MALICIOUS

PDF

95.1 KB Created: 2021-07-15 22:56:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 69a1e7a88e19a1ca636c3c195e1c0ae5 SHA-1: ce663ef34eec7b422dbabb82ab78e82340d5ee3f SHA-256: 3a2c5b842d951be3a89d799fe07c0d9356871db2eb5ac8fe6d5a0f4974c59de1
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to compromised websites, many of which are hosted on disposable domains or use WordPress upload vulnerabilities. The presence of a 'download button' heuristic and the ClamAV detection strongly suggest a malicious intent to trick users into downloading further malicious content. While no scripts were explicitly extracted, the PDF structure and link farm indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 7

  • 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.
  • 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://drafthe.ru/uplcv?utm_term=sniper+fury+unlimited+money PDF link annotation
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/8j7qec4lk1cc3fipbjld4v6p38/41833616118.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160912d6432a7b---vikevu.pdfIn PDF document text
    • https://drrajanmahtani.com/userfiles/files/gelatinulosumilixavilom.pdfIn PDF document text
    • http://smartpaintingplus.com/userfiles/files/lorotuzawetovosabinav.pdfIn PDF document text
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/4a29ed8e27478f1bb42661477a14d2f3/mamiranututevujike.pdfIn PDF document text
    • http://xn--9d0b102a6wc3y4a.com/sa_upload/userfiles/file/20210617215920.pdfIn PDF document text
    • https://sellerflows.com/wp-content/plugins/super-forms/uploads/php/files/b6143b5cd41618e2277246db6badf5db/titulawurepu.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/fd35beda178aa1b5179348d1afe9f2af/dolinatiwewusinavavi.pdfIn PDF document text
    • http://brixtontaxi.com/survey/userfiles/files/gaxabapekifalazesegozover.pdfIn PDF document text
    • https://bechtoldpaving.com/wp-content/plugins/super-forms/uploads/php/files/e6bd84bbac4ab46048d8394389f50ec0/16424937805.pdfIn PDF document text
    • http://travelport.pl/userfiles//file/92627138379.pdfIn PDF document text
    • https://augsburger-dartliga.de/uploads/file/81757186601.pdfIn PDF document text
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cdb47d858d---dusodedaruwukejivenaf.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e3ab9d52cb---10341726061.pdfIn PDF document text
    • http://fashioneducation.ru/userfiles/file/98072367032.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160aa92352fcbf---vaxizexasipanorixixiv.pdfIn PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfd2bc9c6c7---33459768773.pdfIn PDF document text
    • https://www.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a20f447829d---39099647181.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1608e7a79d87e5---wikenebamafarevezor.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608332f36f864---57721725856.pdfIn PDF document text
    • http://truthtube.com/UserFiles/file/22796765991.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

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f06a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF06A 25388 bytes
SHA-256: 7181c688b14fa7bea9bc69ddb87c439e37daec499ef02427dbc7cfdde6e6ceb7
font_01_sfnt_off0001277d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1277D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013f94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F94 10620 bytes
SHA-256: 44d34d433c0af21edde3b3f7f28ac62bd565e872b67c6bbd1b02662ae0a3e1bd
font_03_sfnt_off000157d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x157D5 16724 bytes
SHA-256: 84447b79c344639faea6aa45e936276a22f2c58c0ff69c5e2df4cb749e2286fb

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