Malicious PDF — malware analysis report

Static analysis result for SHA-256 97e677395f83ff06…

MALICIOUS

PDF

78.9 KB Created: 2021-09-06 02:08:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 3d9c4e525f11758f1892d11c821c0557 SHA-1: 348ca3aed11e385c979d61d5757ddaa0a59fc85d SHA-256: 97e677395f83ff063aca9f2d3ec585909af69a10b300074a69121cc9a3dd9283
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to potentially compromised websites, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the structure and URL patterns are consistent with a malicious PDF dropper.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://pistant.ru/uplcv?utm_term=manually+bootstrap+angularjs+application PDF link annotation
    • http://earthtalismanjewelry.com/clients/b/b2/b27d4d76c51cd35ccef873a204118430/File/99113838446.pdfIn PDF document text
    • http://fecirturizm.com/resimler/files/949446866.pdfIn PDF document text
    • https://seataclightingalaska.com/wp-content/plugins/super-forms/uploads/php/files/046d4bc254f37b27879e378095962d06/darodomedadovoj.pdfIn PDF document text
    • http://pwmtqatar.net/userfiles/file/30471433718.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/50v0b3hkmdrps8v220fqqqvku1/97597351424.pdfIn PDF document text
    • http://kerama.altrodesign.eu/ckfinder/userfiles/files/pirob.pdfIn PDF document text
    • http://paradisetourkorea.com/FileData/ckfinder/files/20210809_A35458FC9F84268D.pdfIn PDF document text
    • https://www.vedaaz.com/wp-content/plugins/super-forms/uploads/php/files/e6ee39326a0ede2e04560bc37e640b6c/68489012602.pdfIn PDF document text
    • https://bangprice.com/bangprice.com/beta/cms_image/file/87045799110.pdfIn PDF document text
    • http://nnkcreations.com/userfiles/file/47912233448.pdfIn PDF document text
    • http://happyhanool.com/ckupload/files/vatopik.pdfIn PDF document text
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607780969f658---wulafijidemasoza.pdfIn PDF document text
    • https://rclurie.com/wp-content/plugins/super-forms/uploads/php/files/65eb87aa12fcb83454bbd2b793039a48/wamasulenajigavakoxa.pdfIn PDF document text
    • https://khabul.mn/mmpa/userfiles/files/wovoda.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/avi8rng4scbfuqfb1n4atv7ghl/11131609304.pdfIn PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607273f278ada---88655310788.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/07bf017b9433f8a0b1b30b864f65254f/9950557768.pdfIn PDF document text
    • https://villamishkan.com/310renonew/front/images/files/18208100716.pdfIn PDF document text
    • https://canadianrelocation.net/wp-content/plugins/formcraft/file-upload/server/content/files/16086c599e88af---vuzexofivijaz.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/16093afaa8cca4---92009185715.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1607e97171fc30---bokixopolusuxoxete.pdfIn PDF document text
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/e6203951bf8ead789f7cf9d44d35d324/dotunudugewilavit.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_off0000ce70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE70 10896 bytes
SHA-256: 7f79959e6cd37e544506c21c0eb649717b4c9f5586f7c9edb151eb1019e39e86
font_01_sfnt_off0000e793.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE793 17568 bytes
SHA-256: e929f8dea8976f83a3fd2d1d8f9625a2bcc294cdc179b814d8703b94258935dc
font_02_sfnt_off000115b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115B7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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