Malicious PDF — malware analysis report

Static analysis result for SHA-256 af66f139020c4cb2…

MALICIOUS

PDF

90.0 KB Created: 2021-07-14 05:57:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 50d845060878c6ef9570720262ea1d82 SHA-1: a9dbe222b053c660b2149b891de9f15ceb0273b1 SHA-256: af66f139020c4cb2f360b32128fa91bf1a0217057e5dcb78bc5afe298901da47
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and disposable hosting domains. The presence of these links suggests the document is intended to lure users to malicious external sites, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://garglob.ru/uplcv?utm_term=how+to+play+indian+flute+pdf PDF link annotation
    • http://metabolit-plus.ru/files/file/wagapigutawegu.pdfIn PDF document text
    • https://ldoris.com/upfile/files/20210703235623.pdfIn PDF document text
    • http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aaa59dc19cd---84989983220.pdfIn PDF document text
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/f9c2f5fdcdabe2882fc21eeff652886f/57698715677.pdfIn PDF document text
    • http://muaah.ca/userfiles/files/vijavusuxod.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606fe76503d79---motubijopap.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/07b45667883548b2164e2a0a3830438d/safisidaxomaliwogepufoze.pdfIn PDF document text
    • http://asfus.net/virgsurv/userfiles/file/talepumanogugok.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093d228d0250---95129567182.pdfIn PDF document text
    • http://mnogonomerov.ru/uploads/file/59125868069.pdfIn PDF document text
    • https://www.infrascale.com/wp-content/plugins/super-forms/uploads/php/files/e37a74a04d414d7268690c8b892baa1e/fekowofobuxalawix.pdfIn PDF document text
    • http://kunjipsc.com/uploads/files/56759214442.pdfIn PDF document text
    • http://easyliveconstruction.com/ci/userfiles/files/2703079648.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160853fbf49df1---94226600793.pdfIn PDF document text
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ee3deba113a---fofejedivozufopibewa.pdfIn PDF document text
    • https://elpmarketing.ca/wp-content/plugins/super-forms/uploads/php/files/5eeb9de0c572065226107745d362b066/xijefuwo.pdfIn PDF document text
    • http://onnetsolution.in/userfiles/file/68512774191.pdfIn PDF document text
    • http://goref.ru/files/file/89113473150.pdfIn PDF document text
    • https://castilloexterior.net/ckfinder/userfiles/files/nunasupatawuxebarira.pdfIn PDF document text
    • https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/f04e5c708e6d0dd6bd5cdd723e0f5b10/35892860005.pdfIn PDF document text
    • http://peggylittlelawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/nupikadaxaxukegujib.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/160807efa49f20---40943650258.pdfIn PDF document text
    • https://singaporeroadshow.com/wp-content/plugins/super-forms/uploads/php/files/8ba4e472ddfc897c0dfee2a471c6a2b8/85266761945.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/mojifipotal.pdfIn PDF document text
    • https://prosegik.com/wp-content/plugins/super-forms/uploads/php/files/89891e6b7fffa01938bd80d583e1b025/56533102315.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE39 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001164b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1164B 16984 bytes
SHA-256: 9a07987ae31ccf766e9b1dd5aa7db4f17c8b3188dc00ae22cb1d6d6fc1d73783
font_02_sfnt_off000142c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142C4 10516 bytes
SHA-256: a013e40c1e26c5d3f02cbcedf87f9aa7dffb3add94874337e1b4bcf1ac7beb70

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