Malicious PDF — malware analysis report

Static analysis result for SHA-256 7347ae9b22ef5d8f…

MALICIOUS

PDF

94.5 KB Created: 2021-06-29 14:09:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: ad01f1ecd25d19e06a0730cc7709c15e SHA-1: 75f6541e2877834f74c603e134921c9e17dfdda3 SHA-256: 7347ae9b22ef5d8f60b3e8d833280db582a3c7c3bbe548a93f1fed8aeeaa735a
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, with many URLs pointing to compromised WordPress sites. These links likely serve as a redirection mechanism to deliver malicious content or phishing lures to unsuspecting users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9806

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://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1608ecd0ddfe92---42133624483.pdf In PDF document text
    • http://jshtextile.com/UserFiles/file///kekipifalomobibu.pdfIn PDF document text
    • http://monkey-do.net/userfiles/file/musesojoma.pdfIn PDF document text
    • http://werkkledingverkoop.nl/images/docman/files/12460110617.pdfIn PDF document text
    • http://worldnaturalfood.com/image/upload/File/91491638458.pdfIn PDF document text
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c9a11fdb25b---87414667247.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/160adc25293944---nukadisanamamaguxa.pdfIn PDF document text
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/bvh2jdkk4t98vkquprmioj50no/vipopawivo.pdfIn PDF document text
    • https://thejasmineway.net/wp-content/plugins/super-forms/uploads/php/files/ql40bei3ls46tcvj0r6tsu03pt/vuzapox.pdfIn PDF document text
    • http://brnc85.com/clients/878796/File/9035911551.pdfIn PDF document text
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/2e14ff2c5fce022860ce485f26c4b989/61766308727.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3a6fd13b2e---53580204852.pdfIn PDF document text
    • https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/ffbbc9837fad007891c27dd53137a5d4/49695708626.pdfIn PDF document text
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/601a984aa610531581c19ff92f97926c/12897362344.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/78b7ff9e83ffe98a279ab4d8981440e5/27212626621.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a35e6791f5---vatabolafage.pdfIn PDF document text
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/ef1894532b1b7e8f21ef35e5b44d6a8d/mezaw.pdfIn PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a50a9274815---nudabafujosabero.pdfIn PDF document text
    • http://www.onlinetemsilci.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607670c611f61---81888121928.pdfIn PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/65d7bfc0b4dede965de512aeee0d4cb9/14168571665.pdfIn PDF document text
    • http://begemot-rus.com/uploadfiles/file/2021051612542673499.pdfIn PDF document text
    • http://amazingindiaphotos.com/amazingindiaphotos//upload/fckimage/file/gixapukek.pdfIn PDF document text
    • http://op-gold.com/ck_image//files/12476626031.pdfIn PDF document text
    • https://empylean.com/wp-content/plugins/super-forms/uploads/php/files/p1k5cc5uraanq26ndl8906d6hb/nizage.pdfIn PDF document text
    • http://firanywiktoria.pl/uploads/editor/file/18993970596.pdfIn PDF document text
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160a1f92d8c980---lakolowafonugux.pdfIn PDF document text
    • http://alpha-cp.com/userfiles/file/62912397767.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=lotus+and+butterfly+meaningPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010b5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B5F 18932 bytes
SHA-256: b3683ab62bb27b7a686473f5ee9daa0573734786b5dec2649a4b0aeb94b0fc7b
font_01_sfnt_off00013aee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AEE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015305.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15305 11008 bytes
SHA-256: 4cfd562ea8763245fd68afc3ea4702bafda1fd0b9a70c534340dc03992109200