Malicious PDF — malware analysis report

Static analysis result for SHA-256 b93b60454f61f293…

MALICIOUS

PDF

86.1 KB Created: 2021-09-01 00:58:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: ab64686f7d9fc26efcf6b6eb4622e155 SHA-1: c05493b3c695e8c0987c14ba1d3e0b8f1389435b SHA-256: b93b60454f61f293b8608a893213341c00e0a03c72a7d5c8bcc08a909f42d27d
196 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.001 Spearphishing Attachment

This PDF document was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a phishing or trojan delivery mechanism. The heuristic 'SE_CLIPBOARD_COMMAND_LURE' indicates the document likely instructs the user to copy and paste commands into a shell, a common technique for downloading and executing further malicious content. Numerous URLs were extracted, many pointing to compromised WordPress sites, suggesting a distributed infrastructure for hosting malicious files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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=how+to+change+the+colour+in+photoshop PDF link annotation
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/690c339e5f38c9bb7b52ef09b2f28be9/54854655917.pdfIn PDF document text
    • https://www.aifimm.it/admin/inc/ckfinder/userfiles/files/kenenakikusekizorujusov.pdfIn PDF document text
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16098bf8cbb718---barigej.pdfIn PDF document text
    • http://czpohledavky.cz/userfiles/files/72138730174.pdfIn PDF document text
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/sjauco748h6p5dvc3cvtg5s00m/87209995101.pdfIn PDF document text
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/8e074e117c84eb5cd1b0246839da3424/53560354272.pdfIn PDF document text
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8460428c84---wagafef.pdfIn PDF document text
    • https://binarbaidequipment.com/public_html/userfiles/file/negusoxi.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5b52655df0---94541521406.pdfIn PDF document text
    • http://mebco.ru/images/file/39523053548.pdfIn PDF document text
    • http://bjhtdszdh.com/v15/Upload/file/20216301331188689.pdfIn PDF document text
    • https://villatoscana-pi.it/userfiles/file/punogefujopobakadege.pdfIn PDF document text
    • https://mygoaltv.com/ipp/images/uploads/files/91295570914.pdfIn PDF document text
    • https://www.qlsny.com/wp-content/plugins/super-forms/uploads/php/files/fe3248ccefb3136cd59a3f11aeeccc4c/37020198538.pdfIn PDF document text
    • https://mlspoland.co/files/file/wowinapigetadojepe.pdfIn PDF document text
    • http://nousgarage.com/userfiles/file/21270743891.pdfIn PDF document text
    • https://peptidturkiye.com/ckfinder/userfiles/files/22377696425.pdfIn PDF document text
    • http://technology-mp.it/userfiles/files/6497167177.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/25ce431820a63d841033186ea4cc82dc/fegewiwomazufu.pdfIn PDF document text
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161153833699f8---rezilizabinezame.pdfIn PDF document text
    • https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/4311f60bea65c68c7ab352d814bb1633/59191871349.pdfIn PDF document text
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161253709f16cc---91726497493.pdfIn PDF document text
    • http://evevoyance.fr/adh/.-/file/30289502470.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c44e78287ce---28606209983.pdfIn PDF document text
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/160720009ea5a4---manekal.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_off0000e980.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE980 18048 bytes
SHA-256: 5ac20256ef5a5353001ffdf61fe66ba4ba96642fa283f80ac0a06576dd3924aa
font_01_sfnt_off000118e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118E6 10832 bytes
SHA-256: a2fe319448493a5afe0f327950e77eddcc1ac1a89b64e7acb9648fb902acb733
font_02_sfnt_off000131de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131DE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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