Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd022f1fdfe536d4…

MALICIOUS

PDF

86.9 KB Created: 2021-07-29 23:32:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 398cd3dcdc2f2efc20046057ea27a31b SHA-1: 875ec005a934cb8d3a5e9ab9b832243260389386 SHA-256: bd022f1fdfe536d473491017709c2620fccb58dd08e2a3df36c19da847a60ae0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links pointing to compromised websites, suggesting a phishing or malware distribution campaign. The presence of external URIs and link farms on disposable hosting indicates an attempt to redirect users to malicious content.

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://archism.ru/uplcv?utm_term=stanley+fatmax+power+station+not+charging PDF link annotation
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bafa4e9f404---9093191923.pdfIn PDF document text
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fbdfa694189---meropubuxewupepuz.pdfIn PDF document text
    • http://atrsara.ir/resource/files/77228785345.pdfIn PDF document text
    • http://arenda-v-novosibirske.ru/ckfinder/userfiles/files/runilotejo.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a5da93e549e---rakamulexobon.pdfIn PDF document text
    • https://bonpetsupply.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f0bbb61a34---81898849401.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607133be0bfbd---67225735981.pdfIn PDF document text
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/hhf3ifl5ifsbaarmse4b4d3ihh/81971150413.pdfIn PDF document text
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607bd0248daf4---kemalegi.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a30828efef1---57157670071.pdfIn PDF document text
    • https://tiguan-wiki.ru/file/vupobekazigamotojutibup.pdfIn PDF document text
    • http://hydrogears.com/survey/userfiles/files/fonon.pdfIn PDF document text
    • http://pferdefreunde-brueckenhof.de/sites/default/files/userfiles/file/31457351062.pdfIn PDF document text
    • http://seoulsquare.com/userfiles/file/52828988573.pdfIn PDF document text
    • http://selfmadefilms.nl/userfiles/files/45540794316.pdfIn PDF document text
    • https://vietnaminsight.biz/ckfinder/userfiles/files/33531001032.pdfIn PDF document text
    • https://www.myjamaicais.com/wp-content/plugins/super-forms/uploads/php/files/8ce5119cb66689bf68fe62c89066fe34/femidipavabiru.pdfIn PDF document text
    • https://glbtrader.com/userfiles/file/nageberijodo.pdfIn PDF document text
    • https://lifesmart.ro/ckfinder/userfiles/files/botetukaduvano.pdfIn PDF document text
    • http://www.hausbaumesse.at/ckfinder/userfiles/files/40859933039.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/zexojijuve.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_off0000ed08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED08 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001051f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1051F 11304 bytes
SHA-256: 317d03298aeb303cec1df48b2cac093c0ed4b66d5fa82004226ad4e3580f7608
font_02_sfnt_off00011f99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F99 17672 bytes
SHA-256: 28abb494a7ab4a7ae62f08d535ee32d60acefe0d20da4941f0eabac55c2ab0b2

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