Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fc2b8545d2624af…

MALICIOUS

PDF

81.4 KB Created: 2021-10-06 23:24:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 5d33ab5c11c3211e1b9d02231357c184 SHA-1: 80fe9d912514ec82e3008a7fb1fe45907fa6c297 SHA-256: 0fc2b8545d2624af85ddbe8d3f3f6d9e409d5dad04c2e09cb75025e810c03c74
156 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It functions as a link farm, with numerous URLs pointing to various domains, some of which are associated with compromised CMS uploads or disposable hosting. The primary purpose appears to be directing users to external sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://wastran.ru/uplcv?utm_term=the+fairways+at+mauna+lani+for+sale PDF link annotation
    • http://yakutiaprime.ru/SITE/files/editor/file/pufuwapew.pdfIn PDF document text
    • http://showdoimovel.com/files/files/lekepelama.pdfIn PDF document text
    • http://daehwa.info/uploaded/file/4650825772.pdfIn PDF document text
    • http://philipsphotographystudio.com/80890565872.pdfIn PDF document text
    • http://myucmas.com/userfiles/file/puwigolajugoxug.pdfIn PDF document text
    • https://gagiongvitgiong.com/ckfinder/userfiles/files/xeperavabogafewusanef.pdfIn PDF document text
    • https://buyafranchise.org/files/files/vejexerezeziwazazosekize.pdfIn PDF document text
    • http://xn--ob0bjxt9h99icicrvkksa421cwwp7hiv4d6a.com/ckfinder/userfiles/files/devuwosemawifedinodup.pdfIn PDF document text
    • http://businessnavigator.in/ckeditor/uploads/files/zumifadoxijimobo.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615bb88c2981b---11947936527.pdfIn PDF document text
    • http://www.first-classlogistics.com/image/upload/File/godotekuduvetudamake.pdfIn PDF document text
    • http://netcentricnj.com/ckfinder/userfiles/files/demumanovofupomifo.pdfIn PDF document text
    • http://nandishoverseas.com/UserFiles/File/81149160111.pdfIn PDF document text
    • https://ytdrive.com/CKEdit/upload/files/ruduvezoj.pdfIn PDF document text
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/ba41d1e43cac8ba7b52d4a6ce594887b/32576621849.pdfIn PDF document text
    • http://borik.customreal.sk/data/files/kokili.pdfIn PDF document text
    • http://lecostationery.com/files/file/feduxikavubixoniv.pdfIn PDF document text
    • http://mingmitrcoffee.com/user_img/files/64484535867.pdfIn PDF document text
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615716996ccb4---91923527178.pdfIn PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/161570de77a9ea---gibemewegakebetukinidizu.pdfIn PDF document text
    • http://sieckultury.pl/wp-content/plugins/super-forms/uploads/php/files/86258076b68cc2a3f3452def1467b2f3/mobebokexanigubojaza.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_off0000d3f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3F6 19080 bytes
SHA-256: 755245fe02fa4de51936c66f71a2a659e0bc374d46f3b95fa3d8bc25bd5766e0
font_01_sfnt_off0001061a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1061A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011e31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E31 10744 bytes
SHA-256: d8504a8a2884fb9dc74cd8d1befee98f7754efec6656c0139d650c6edf6642c4