Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b6420331658759f…

MALICIOUS

PDF

83.2 KB Created: 2021-08-15 00:01:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: c7d5c47fc90cbc25ef43db512c58759a SHA-1: cb031db580708b407075d93b640fd16fe30893b4 SHA-256: 8b6420331658759f5b6c7084ea7657dd9a533819f76d282903fa0aed1c653b1a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document exhibits characteristics of a phishing lure, indicated by the presence of numerous embedded URLs pointing to various domains, many of which appear to be compromised WordPress sites or disposable hosting. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to phishing pages or download further malware. No scripts were extracted, but the structure and URL patterns are consistent with a link farm designed for malicious redirection.

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://garglob.ru/uplcv?utm_term=organic+chemistry+vollhardt+8th+edition+solutions+pdf PDF link annotation
    • https://iveducentar.com/uploads/assets/file/55630814377.pdfIn PDF document text
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/69319456294.pdfIn PDF document text
    • https://poolpoint.be/uploads/file/josobubowet.pdfIn PDF document text
    • http://cukorbetegshop.hu/files/2693159939.pdfIn PDF document text
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/7fd652m8bk79p5k79muns7j9mg/zalerufaz.pdfIn PDF document text
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/1af451a7d8590419b8f9a26297844684/bokumesuw.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abd1f0ba171---29584831377.pdfIn PDF document text
    • http://cp-1.ru/userfiles/files/vexiki.pdfIn PDF document text
    • http://www.tiande-global.com/ckfinder/userfiles/files/65919586755.pdfIn PDF document text
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ee5bb7a10e---rojaxa.pdfIn PDF document text
    • https://airflow-skateboards.com/upload/file/5605480800.pdfIn PDF document text
    • http://studiotravenzolo.it/userfiles/files/zivelulaxotirapobebonem.pdfIn PDF document text
    • http://planbmedia.hufiles/fifamewulewo.pdfIn PDF document text
    • http://traiteur-ribot.fr/userfiles/file/poruxirujakaxodol.pdfIn PDF document text
    • http://bhhangkhong.com/upload/images/files/jafovawum.pdfIn PDF document text
    • http://hillcountryawningsandsunscreens.com/wp-content/plugins/formcraft/file-upload/server/content/files/160720499cbeb0---36798771739.pdfIn PDF document text
    • https://kaptenhoki.com/contents//files/dibij.pdfIn PDF document text
    • http://afghansolar.com/userfiles/file/guramupajazepupa.pdfIn PDF document text
    • http://leinerpakgelatine.com/survey/userfiles/files/84886826938.pdfIn PDF document text
    • https://medicinasolidale.org/wp-content/plugins/super-forms/uploads/php/files/bd25ff1bbea1e9ddb2f2b3eaee26ab4c/xesusewofojetovi.pdfIn PDF document text
    • http://frezerovka.by/images/fxeditor/file/48232762726.pdfIn PDF document text
    • http://ohsclassof73.com/clients/9/9a/9a21b0b253f7c4eafe662346d237c286/File/durawapuzomaronejoraxup.pdfIn PDF document text
    • https://ambalatender.com/upload/files/29689512269.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_off0000e09d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE09D 16288 bytes
SHA-256: f8dad7f2544b29eefc026e6902cfb788160869f2580367464b748347b57b18f1
font_01_sfnt_off00010a9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A9D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000122b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122B4 11580 bytes
SHA-256: 0309c0189346d6a3a1247ac940f5f1931d83a257bf5ea47083b7fab160ed366f

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