Malicious PDF — malware analysis report

Static analysis result for SHA-256 1756864eb5119920…

MALICIOUS

PDF

112.3 KB Created: 2021-07-26 03:09:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: b1a1facd01728d465baccb239fcef3ae SHA-1: a94cdb58a53a522a879d7c14b22dc3f6c1b8584c SHA-256: 1756864eb5119920f0dd6ea0e8b193f36659977e49fc63d7d0a4ea3699d96442
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate the presence of a link farm pointing to compromised WordPress upload directories, suggesting a phishing or malware distribution attempt. While no scripts were directly extracted, the nature of the links and the detection suggest it likely serves as a lure to download further malicious content or redirect to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9944

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 http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b17046659d4---50703412983.pdf In PDF document text
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/48950fac5d236702b670e5876c36cd7f/68040557345.pdfIn PDF document text
    • http://bukharaalpharetta.com/sites/default/files/file/86556520009.pdfIn PDF document text
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e435cf9e57f---vebeguduwuxegivego.pdfIn PDF document text
    • http://jagodkaprzedszkole.pl/userfiles/file/28222224530.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092119d19f02---7683217442.pdfIn PDF document text
    • https://motacademy.it/file/sobubezoj.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/61fe24020ecd3a2f67dec19042a77a53/zekobarin.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/2339bf2027d3ed353dd9151aa674cc39/36369413868.pdfIn PDF document text
    • http://accomplishtheimpossible.com/userfiles_ati/file/62839786052.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083785b17120---55157003505.pdfIn PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/72eea70b185850fe654f6993c7d19164/41094762799.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084fc3b7aeba---nefidedapoxunima.pdfIn PDF document text
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/ablavcjp8qdeuq4eu8gpq3cvnl/64996562426.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/160e2c0a44fe24---26865056532.pdfIn PDF document text
    • http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae479b2541c---13863785580.pdfIn PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/8b35c25c18c2fdfff00dac0167feea11/gevijagezinemesak.pdfIn PDF document text
    • https://iescolumbus.org/wp-content/plugins/super-forms/uploads/php/files/89e4b01196204f396d66ad84264e4096/94190911429.pdfIn PDF document text
    • http://doubler-son-capital.com/photos/files/bevaneg.pdfIn PDF document text
    • http://www.esthemed.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160b1865649544---3977862126.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/rudelulubetubev.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=minna+no+nihongo+chuukyuu+2+workbook+pdfPDF link annotation
    • 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_off0000efd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFD7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000107e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107E5 31280 bytes
SHA-256: d8bae4b6b7fb7283d1d249ff4a727a7e8cb5b09e77d9dfd61a71fb0ff62bfa8a
font_02_sfnt_off00015e92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E92 24616 bytes
SHA-256: eb054b6b8b3f7f0c64d1742e98d79ed35a9641839cd5641efb506406cafb607d
font_03_sfnt_off0001966e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1966E 11100 bytes
SHA-256: cef308b7f5221e789a1c29b69e1225f5b8f53a9185a58aa825b3ea74dc24f646

Open this report in the interactive analyzer, or submit your own file for analysis.