Malicious PDF — malware analysis report

Static analysis result for SHA-256 691a06ab7d2b7794…

MALICIOUS

PDF

79.7 KB Created: 2021-07-24 21:47:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 95be784109a88b3208ab94f79d6d2d98 SHA-1: 770a8cd226e66f1d620861f2992989b1a92267e6 SHA-256: 691a06ab7d2b77946374b7265e0043d081b3af9412eaf926e622e047bc9a95af
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to various websites, some of which are hosted on compromised CMS platforms or disposable domains. The primary purpose appears to be directing users to potentially harmful content, such as phishing sites or malware downloaders.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://thepokewave.com/uploads/files/tilivelesetaxiz.pdf In PDF document text
    • http://atut-biuro.com/uploaded/file/bonoroli.pdfIn PDF document text
    • http://kapli74.ru/upload_picture/pamirupikilurojux.pdfIn PDF document text
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/51d10d3e03a893f6355a7a0c168ca0a1/tigulebedoxofag.pdfIn PDF document text
    • https://travelsafeway.com/userfiles/file/wovezigimukimezerurodulo.pdfIn PDF document text
    • https://dolmalatrek.com/userfiles/file/siredofipipulij.pdfIn PDF document text
    • https://www.electriclighting.com/wp-content/plugins/super-forms/uploads/php/files/13634a56be98237d125319b40079c10e/lanofowimanufajimaf.pdfIn PDF document text
    • http://sllight.ru/design/img/upload/file/doxapefosipetifumose.pdfIn PDF document text
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c9ad35abc3c---powegevobesuvuxomeki.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160be89ad643c2---4417539861.pdfIn PDF document text
    • https://aihr-iadh.org/uploads/FCK_files/file/favajog.pdfIn PDF document text
    • https://www.erenang.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dc71d12225---83428416517.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081eb082b3a5---77079623015.pdfIn PDF document text
    • https://chokysitohang.com/Uploads/userfiles/files/filuvidedanebe.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1a5e06478a---98663840307.pdfIn PDF document text
    • http://smartarts.bg/userfiles/file/86069261549.pdfIn PDF document text
    • http://fitviewer.de/files/file/tujutotuxezejosevise.pdfIn PDF document text
    • http://odessahighschool1970.com/clients/7/70/70263b1be1b93b62200e198143f59f20/File/34072599532.pdfIn PDF document text
    • https://nulifeus.com/~nulife/userfiles/file/6512430300.pdfIn PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/63bo179bi70des92d3b4rp23k5/3285605562.pdfIn PDF document text
    • https://dbjadow.pl/attachments/file/99790825203.pdfIn PDF document text
    • http://xn--365-pn7mwb654m2qn.com/ckupload/files/59303627442.pdfIn PDF document text
    • https://defi128.com/userfiles/files/xekerunaz.pdfIn PDF document text
    • http://hhs63.org/clients/8/88/88ec95b665b56da82b1de85f097fba10/File/95226226999.pdfIn PDF document text
    • https://samiznojmo.cz/wp-content/plugins/super-forms/uploads/php/files/830743f420ec00d5d13596f6c15c53aa/58932856110.pdfIn PDF document text
    • http://strandedtattoo.net/file/60597662335.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=benim+hocam+2020+co%C4%9Frafya+video+ders+notlar%C4%B1+pdfPDF link annotation
    • 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_off0000ceb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEB5 17796 bytes
SHA-256: b1d67d80530803a6213c0a2a6d67757fd1c8708a06a2e94f8cff6d6824688f5c
font_01_sfnt_off0000fafd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAFD 11640 bytes
SHA-256: eaa088c4100a0661a144044d1553f37af7218dd08d736fe25e0b7d12bc4456db
font_02_sfnt_off0001164f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1164F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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