Malicious PDF — malware analysis report

Static analysis result for SHA-256 f34ed40affdde2ba…

MALICIOUS

PDF

81.2 KB Created: 2021-09-03 17:11:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: a161ca9641326cc368edba6b56cd8981 SHA-1: 0bdd2a3a770fb22b25740b00e2c0fde182e02e08 SHA-256: f34ed40affdde2ba5aedfb63c1829509018bfec5035aa40192d873cac6fc8005
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous URLs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed for SEO manipulation or to host malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a phishing or redirection campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/q37a3ju8f8ilua4aao3qto5lf1/53089088312.pdf In PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2506110c5c---ziwatumurekadokixuguva.pdfIn PDF document text
    • https://ibeguiristain.com/userfiles/files/jimeneruvimosef.pdfIn PDF document text
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/9a1ea91d77bf89fbad818ca617e92be1/finikotobujot.pdfIn PDF document text
    • http://nelly-design.ru/upload/files/xorizelezalav.pdfIn PDF document text
    • https://regeneracion-capilar.com/wp-content/plugins/super-forms/uploads/php/files/041cb8a80a6adc380932131c9de6b9fa/timomulokudakow.pdfIn PDF document text
    • http://traktorpulling.de/ablage/userfiles/files/38828040789.pdfIn PDF document text
    • http://emeraldoutback.com/clients/f/f6/f61299a274fa8fdb0c00f5b1ed511d42/File/lusati.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/070719227686.pdfIn PDF document text
    • http://c-amc.com/upload/files/31288648858.pdfIn PDF document text
    • http://kesifveotesi.com/files/mojulipo.pdfIn PDF document text
    • https://carea2plus.com/wp-content/plugins/super-forms/uploads/php/files/10b1a2cf08f47c383917e767825d0528/tufimalafagetarawa.pdfIn PDF document text
    • https://willmarareachamber.com/ckfinder/userfiles/files/dejavan.pdfIn PDF document text
    • http://ip-golubev.ru/ckfinder/userfiles/files/72456105290.pdfIn PDF document text
    • https://farmacieitaliane.com/documenti/file/28085198811.pdfIn PDF document text
    • http://instant-image.net/UserFiles/Site/File/38804398315.pdfIn PDF document text
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/dc3d5omnhtpcsirl2rbjhcntn3/duvosojitevonoti.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/329933ba825c3517d2fc7a679c108add/81077476589.pdfIn PDF document text
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/7cc11d492deda69eef8e09acb7dea5fc/8929596019.pdfIn PDF document text
    • https://inverpalmas.site/aym_image/files/petepuwawanilimipi.pdfIn PDF document text
    • https://driftwoodcc.com/userfiles/files/digukebekezo.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/747d2bb0d399394da62b6e422ad10eb0/3434787956.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=safety+valve+maintenance+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_off0000dbc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBC1 10648 bytes
SHA-256: 4c8982adb1a1e468d648808e61b94e5da9949ebfdc9f93ee4f0de0a79c82d223
font_01_sfnt_off0000f424.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF424 16552 bytes
SHA-256: 540820da827c13c9a3808c868839e46ea167bcba6d188cccab1495b0ba6fc4a0
font_02_sfnt_off00011f2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F2F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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