Malicious PDF — malware analysis report

Static analysis result for SHA-256 69e6517338bcaeb8…

MALICIOUS

PDF

88.4 KB Created: 2021-07-16 12:51:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 713512bd51156ee8afb0e43b49e4d3fe SHA-1: 4d72450b520e5a0c71948a4d3a9b9ba223c02c3f SHA-256: 69e6517338bcaeb883756369a4a1dad9d334c19320b8bc73be2270d1add89269
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised or disposable domains, indicating a link farm designed to redirect users to malicious sites. ClamAV detection and ML classification strongly suggest this PDF is malicious, likely used for phishing or distributing further malware. The presence of external URIs and link farm heuristics confirms the malicious intent of directing users to external, potentially harmful, content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://philabc.ru/uplcv?utm_term=substitute+for+sherry+in+stir+fry PDF link annotation
    • http://blueyee.com/upload/file/281111338943.pdfIn PDF document text
    • http://odessahighschool1970.com/clients/7/70/70263b1be1b93b62200e198143f59f20/File/52145071620.pdfIn PDF document text
    • https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/c9n44md4nm7okk0r1sv5jhrhv1/fivenofawasawewobajoluwu.pdfIn PDF document text
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f5e16c8b94---wuratevelar.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16071bb0e3af9f---3605398217.pdfIn PDF document text
    • http://brainbond.ro/userfiles/file/wokojekajil.pdfIn PDF document text
    • https://mimpiindah88.com/contents//files/48591350429.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a18c9e431ed---48964743704.pdfIn PDF document text
    • http://rajhansnursery.com/userfiles/file/murifanabifojalatelex.pdfIn PDF document text
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/bb72496a35a6a6cbe83a1e05e0e75d15/dileguxanamuwebufewim.pdfIn PDF document text
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/160ee5e1f2a4fa---32219810241.pdfIn PDF document text
    • http://mattstergamer.com/wp-content/plugins/super-forms/uploads/php/files/02q2gn8ltaqq0buqej0r89qh5r/rodukukawobafiderazu.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/160899ae776ef1---luguledinoxugij.pdfIn PDF document text
    • http://attep.com/home/sandbox/domains/heekee.com.hk/public_html/ckfinder/userfiles/files/doginofasipazavadaxokebo.pdfIn PDF document text
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afb548a2fea---23429381225.pdfIn PDF document text
    • https://canionglobal.com/FCKeditor/file/49464512931.pdfIn PDF document text
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/160d427a3a0b03---60580071329.pdfIn PDF document text
    • http://kennedy-jackson.com/clients/f/f7/f78508644b517540cdb1549d93860f53/File/64374722244.pdfIn PDF document text
    • https://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/c65d60c1de782deddc36597160648ac7/91120925372.pdfIn PDF document text
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608573cb4368e---poxagag.pdfIn PDF document text
    • http://www.asslar.de/downloads/814309139.pdfIn PDF document text
    • https://www.explosivo.gr/wp-content/plugins/super-forms/uploads/php/files/4468c0a0471bc142f6cd186eb6b81ffb/94564586502.pdfIn PDF document text
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a92e01a0bca---13304588871.pdfIn PDF document text
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/974117ea4e4f16d51cfbebf7614a0122/dagifiviketufabakomoxofe.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_off0000f5a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5A0 17788 bytes
SHA-256: 7ef3804f7f4c881cfb1724398e0fa890593bcb88c0122c2031e3e23e562057f3
font_01_sfnt_off00012481.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12481 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013c98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C98 10532 bytes
SHA-256: 0b3961c2e481eced355df15c99eef1a469209ba9c596f9f45d89277991f350bf

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