Malicious PDF — malware analysis report

Static analysis result for SHA-256 30520932266b397f…

MALICIOUS

PDF

94.0 KB Created: 2021-09-01 07:57:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 7583f738e2730ab24e0d048499ea706d SHA-1: 954164a04ac4481142de40ceeb15797d7a581d71 SHA-256: 30520932266b397f0d606a096d09d802d6a185dd6bcaba76fb74d01d337985e6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of links pointing to various websites, many of which appear to be compromised CMS uploads or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or SEO manipulation. No scripts were extracted, but the structure suggests it's designed to lead users to external, potentially malicious, content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://albertopizzetti.it/userfiles/files/19601303586.pdf In PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1611f01c1bf534---xapaziwanivovi.pdfIn PDF document text
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/126be2e901037c782ea45ada375d923d/pazuridenosukedagerufe.pdfIn PDF document text
    • https://nepalmicrofinancesummit.org/userfiles/files/kopesoravizefoxo.pdfIn PDF document text
    • http://www.mearesandassociatesllc.com/siteuploads/editorimg/file/83790058526.pdfIn PDF document text
    • http://meghdoothsuzuki.com/uploads/pominubesavutaw.pdfIn PDF document text
    • https://www.urban-quartz.co.uk/wp-content/plugins/super-forms/uploads/php/files/5da324db54201b64729848bcc96600e7/43309683305.pdfIn PDF document text
    • http://meimagedance.tw/ufiles/files/todimajitogoteruvoretavo.pdfIn PDF document text
    • https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae9caa54344---16356182358.pdfIn PDF document text
    • https://c4ir.ae/wp-content/plugins/super-forms/uploads/php/files/09ggn6fiqj06jgpf8pi3n60en3/vinesu.pdfIn PDF document text
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/l98m97dk2jbuo2eamnm7sv8011/zosubogekelugukalupeviju.pdfIn PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/8607250186a43f5ff4918d4417ae1a0c/laninofozewepekegakot.pdfIn PDF document text
    • http://robertfeinberglaw.com/images/edit_images/file/74791024543.pdfIn PDF document text
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/3bc083bd7862edeab60474666d432252/95396326785.pdfIn PDF document text
    • http://airfa.it/userfiles/file/rodiwasunasa.pdfIn PDF document text
    • http://ogledalata.bg/uploads/pages/files/muvebefubez.pdfIn PDF document text
    • http://www.benyowsky.com/resources/files/mukozinovufititek.pdfIn PDF document text
    • http://ccadl.com/files/20210819025657.pdfIn PDF document text
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092583413097---40813036449.pdfIn PDF document text
    • https://aletihad-group.com/userfiles/files/sakavusu.pdfIn PDF document text
    • https://usssecuritate.ro/userfiles/file/12355959568.pdfIn PDF document text
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/3b6d4894b42739e976bae56b1e3d05c5/96630598247.pdfIn PDF document text
    • http://schooldistrictservices.com/clients/f/f6/f6ab1571d2cdf5e569af7b76e288b17c/File/gifedifivedudesatidive.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=what+is+an+inverse+relationship+in+sciencePDF 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_off00010670.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10670 10532 bytes
SHA-256: e74ddf566ba41adaa716a14660cc4c022ac842c4094b5c445fc58a7174913173
font_01_sfnt_off00011e68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E68 19356 bytes
SHA-256: 4c84513aee22418de21984d4cc68564e2b6a3f5a4f6dac5359c3511a2c80440b
font_02_sfnt_off00015168.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15168 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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