Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d64ac3bd0aadcf5…

MALICIOUS

PDF

81.8 KB Created: 2021-06-24 19:47:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 1bab272c63cc29344a5b0c643f1fa7d9 SHA-1: fdf39677851749aa0d8472dac7f41d533f85e300 SHA-256: 7d64ac3bd0aadcf52d53aac2084216ec2b17cc6119042af10ba4eda2a7d7c4d8
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple links pointing to compromised WordPress sites, acting as a link farm to host malicious files. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were directly extracted, the PDF structure and embedded URLs suggest a mechanism for delivering a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8db3b09d50---55040537438.pdf In PDF document text
    • http://kagoshimakojintaxi.com/userfiles/file/vebufesosekeropimale.pdfIn PDF document text
    • https://singaporeroadshow.com/wp-content/plugins/super-forms/uploads/php/files/df15d0ea6d1d2cc6c051b32a1cb81b96/xawobokimikixoxoli.pdfIn PDF document text
    • https://caribemed.com/userfiles/file/69434357294.pdfIn PDF document text
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/ci7ak9465k59bci1irvlql7bi7/mawekopijemudaxatutase.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acaeeb1d798---xelalabevogenime.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/1607787bc10eec---serijovifasumozufof.pdfIn PDF document text
    • https://dursunguney.com/userfiles/files/degarupenagu.pdfIn PDF document text
    • https://ilc.ua/wp-content/plugins/super-forms/uploads/php/files/la8gamj1r2lku715iqnneviuj4/marexagujumovirerovi.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ad8ac7da34---91682002322.pdfIn PDF document text
    • http://apluskleaning.com/admin/images/file/40365233505.pdfIn PDF document text
    • https://panama4d.com/contents//files/wuvinedipexir.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b312750cbd1---pozetirigojodo.pdfIn PDF document text
    • http://c2r-auto.com/uploadfiles/file/2021052520211573499.pdfIn PDF document text
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608ba515bd35a---ragekif.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a3f4c42fa62---sunaruregikevotabatade.pdfIn PDF document text
    • https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/2716368f21d9fc2b75d8f882b603c116/58265080783.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=organic+chemistry+jonathan+clayden+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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ffe3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFE3 5772 bytes
SHA-256: 039a01e78d4fde0e962ed788bd647a326f46351dbcff10de46f6bc9621b27409
font_01_sfnt_off0001136d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1136D 11328 bytes
SHA-256: 7ce03f84a1507fc771306edb17cc2f20bbe6725e1552fcbbe1fc7de9a6dc98f0

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