Malicious PDF — malware analysis report

Static analysis result for SHA-256 46294db57dc1edb5…

MALICIOUS

PDF

83.1 KB Created: 2021-09-01 15:04:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 30b3402a35be911c10a0a5491dd158fd SHA-1: ee638eb83ed5822b430983c5f99c7e8a9efd0c29 SHA-256: 46294db57dc1edb54f3e16d782ff29c3f14bc5b29a8e53f61514b84a6cf636a7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs pointing to various domains, many of which appear to be compromised WordPress sites. Heuristics indicate this is a link farm designed to redirect users, with a high ML score and ClamAV detection confirming malicious intent. The primary purpose appears to be directing users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://krisoc.ru/uplcv?utm_term=macbook+pro+2018+recovery+mode PDF link annotation
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/e4b6017af4e81ede21b223101d0f3421/xoxowigadujakazovuzosili.pdfIn PDF document text
    • http://www.rosabrockenhaus.ch/ckfinder/userfiles/files/72376281240.pdfIn PDF document text
    • http://safaraval.com/basefile/safaravalcom/files/22675458499.pdfIn PDF document text
    • http://ithaca1966.com/clients/8/85/85e9e0a76fddb83d7689cebc6ab07fae/File/busijitipo.pdfIn PDF document text
    • https://ltssinternational.com/res/wysiwyg/file/rerer.pdfIn PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609aa8d648c03---togupanemawusojera.pdfIn PDF document text
    • http://phongkhamtamthan.net/uploadeditor/files/95604463071.pdfIn PDF document text
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2b41321947---sutiv.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160768f6eca59a---84819078376.pdfIn PDF document text
    • http://fra2ange.it/userfiles/files/54755798850.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085d020aed5a---tuziroguxumaketera.pdfIn PDF document text
    • http://xn--80age2amlc.xn--80adxhks/pics/images/file/33307869711.pdfIn PDF document text
    • http://chiengthai.com/file_media/file_image/file/wotusanukodod.pdfIn PDF document text
    • https://hbfilm.ca/resimler/files/popajawe.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/616840a70a635ae1c43a94079ad05b48/zolilujexufima.pdfIn PDF document text
    • http://zgkimsteszew.pl/img/upload/files/mawagaliseludajakuj.pdfIn PDF document text
    • https://fuchscars.com/wp-content/plugins/super-forms/uploads/php/files/be4a62fbe5db0c95e7862837697812e3/xisudibasamugoxig.pdfIn PDF document text
    • https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606c92925f2ee---51706312700.pdfIn PDF document text
    • https://chp-travel.ir/data/file/68446777007.pdfIn PDF document text
    • https://avukatwebsitesi.trakyasoft.com/upload/files/damugipuzagixeju.pdfIn PDF document text
    • http://lnaixi.com/userfiles/file/20210723031537_1754756807.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_off0000df22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF22 17720 bytes
SHA-256: 3706deab2ab8ea3a20b96ab7264be5db88cbd8a0a696a01e31e98d8305849ba2
font_01_sfnt_off00010d2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D2D 11072 bytes
SHA-256: 5f0ac203614c9cb3b63ef8b6a89905c7a52977c1668442c7b2587b74e82675a8
font_02_sfnt_off000126f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126F6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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