Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e8046062f4901af…

MALICIOUS

PDF

80.7 KB Created: 2021-09-13 02:10:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 271b65ae5a959dd48338d7ddd1af2fcd SHA-1: eca773f66c1310aee13c21457bcfc3a3647e5fc4 SHA-256: 2e8046062f4901af3ec3ec5f0f5e64095ac92cea516c4d0d5b6ab4d56cef324b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs pointing to various domains, many of which are hosted on disposable or compromised infrastructure. The presence of 'utm_term' parameters suggests an attempt to leverage SEO for traffic generation, indicating a phishing or scam-related lure. No scripts were extracted, and the document body was unreadable, but the heuristic firings strongly indicate a malicious link distribution pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9877

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://thic.muki001.com/plugin/ce1/ckfinder/userfiles/files/81356265182.pdf In PDF document text
    • http://clarksville.net/wysiwygfiles/file/mosuvuneluwar.pdfIn PDF document text
    • https://taksis.lv/taksis/userfiles/file/tekijejelazezuluxoresu.pdfIn PDF document text
    • http://www.letnifestiwal.pl/ckfinder/userfiles/files/zapatizidamisizovipije.pdfIn PDF document text
    • http://uchid.com/uploads/file/5776675665.pdfIn PDF document text
    • http://yurisolomko.com/userfiles/file/rawix.pdfIn PDF document text
    • http://ikkosushi.com/uploads/files/90526213525.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1612f553d0c597---79278945916.pdfIn PDF document text
    • http://sarkanyhajo.hu/files/file/xomiju.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139b1a67d9fb---metevelogazux.pdfIn PDF document text
    • http://xn--9w3b11kh5l.com/ckupload/files/60980641962.pdfIn PDF document text
    • http://world-housing.jp/ckfinder/userfiles/files/joniperudam.pdfIn PDF document text
    • http://reafamily.lt/ckfinder/userfiles/files/51608108249.pdfIn PDF document text
    • https://bdblue.com/ckfinder/userfiles/files/vizupesepotamofupivew.pdfIn PDF document text
    • http://swhos.com/upload/files/mabitadiloranapofidajob.pdfIn PDF document text
    • http://bishnutoursandtravels.in/userfiles/file/zoxodakibeba.pdfIn PDF document text
    • https://ip-kamera-rendszer.nuttydog.hu/ckfinder/userfiles/files/85057881710.pdfIn PDF document text
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/79eb2110dc5166a4cda688ed9aa999f0/71925131852.pdfIn PDF document text
    • https://yellowmangocafe.com/userfiles/file/58827914932.pdfIn PDF document text
    • http://gtlitalia.com/userfiles/files/bisokumipitutisareneb.pdfIn PDF document text
    • http://ventilyatsia-v-sochi.ru/ckfinder/userfiles/files/66061950660.pdfIn PDF document text
    • http://p-jtech.com/userData/board/file/dujefafenavizila.pdfIn PDF document text
    • http://globalsublimation.net/uploadfile/files/sajugizekapowofejonin.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/16137fc4cafcc0---jefaluduvafenukof.pdfIn PDF document text
    • http://neoneophytou.com/ckfinder/userfiles/files/47785679792.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=mirzapur+movie+download+mp4moviezPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b3cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3CD 1680 bytes
SHA-256: 6c08887b596ecb472c5a0482df8c2f828d83fc5b5d16111ed0caa1fced1b35dc
font_01_sfnt_off0000bbc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBC4 16060 bytes
SHA-256: 64af0185a2beffa7382febdf957b2ddd2015d3985e5bc97cf8ad64f3c2914973
font_02_sfnt_off0000d0d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0D5 19408 bytes
SHA-256: d765f915c51b8171dc2c01d35a10ecfcdbf8ec7a473d8cc8c2b6c0fcea4678f0
font_03_sfnt_off000101f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101F4 10672 bytes
SHA-256: ef470f5a164e1376761ff73560f17b5467b83e88dcf2fcfbaa342d20624de7bc
font_04_sfnt_off00011a7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A7B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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