Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd8b3d26a1dc0d46…

MALICIOUS

PDF

90.6 KB Created: 2021-09-01 17:19:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 969798319ac94c61067a04c7e878e5a0 SHA-1: 40dfac59749c9a4e1781bd2f806a0495dd411a00 SHA-256: dd8b3d26a1dc0d462e93cfa89791368d95dec853e8f528d335771bb424d7bb6f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file is a PDF identified as malicious by ClamAV and an ML classifier. It contains numerous links, many pointing to websites hosted on compromised CMS platforms, suggesting a phishing or malicious redirection attempt. No scripts were extracted, and the document body was unreadable, limiting further analysis of the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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 https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/95f06edc18b25f09922c3999a9e0c55d/92210039694.pdf In PDF document text
    • http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbfbf16b51---7734215387.pdfIn PDF document text
    • http://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073bba3d6f50---memakupudasozikevuwabilu.pdfIn PDF document text
    • http://charivne.info/images/file/puvujilikomuvuzaz.pdfIn PDF document text
    • http://kwartetproforma.com/userfiles/file/dixumodovugesajojotapajo.pdfIn PDF document text
    • http://nnrhc.com/clients/9/98/980d61ede38c9a35fe3396fb65651545/File/66612561837.pdfIn PDF document text
    • https://fundoohairstyles.com/hairstyler/images/file/dumizurozapewuvafefifoxo.pdfIn PDF document text
    • http://aroma-es.site/yamituki-n/uploads/files/73465610251.pdfIn PDF document text
    • http://sacoorhealth.pt/site/upload/file/virurulujapedaku.pdfIn PDF document text
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081376e73123---65711681070.pdfIn PDF document text
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/drlm711nbla94cf624elk4chpv/14983764435.pdfIn PDF document text
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093b0e15e1a9---53682373815.pdfIn PDF document text
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/7e573aad3f939dc1fab2b476b926321f/tedudutoxoxezitaragawo.pdfIn PDF document text
    • http://euro520.net/userfiles/file/16239427251068145174.pdfIn PDF document text
    • http://grafordexstudents.com/clients/0/05/05b3dbe7dd9dc6f92b523d2b721f2ffd/File/34376972949.pdfIn PDF document text
    • http://ghinelliarchitettura.it/userfiles/files/31559567189.pdfIn PDF document text
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/160f4a5cc8d8be---98400518327.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/895f441288c68f77f85c62fa7d81307a/wajugabugazuweseva.pdfIn PDF document text
    • http://www.bash.cl/media/file/milabinozolap.pdfIn PDF document text
    • https://chambredhotes-savoie.com/ckfinder/userfiles/files/33856173179.pdfIn PDF document text
    • http://hidropro.hu/upload/kupifusaxurudi.pdfIn PDF document text
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/d6urmc8oevlc1m8vldod3nj51q/50008856628.pdfIn PDF document text
    • https://badoza.net/userfiles/file/70592582864.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b075eabde9a---firofamodibiwagejamev.pdfIn PDF document text
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609ca83cc56a5---feteri.pdfIn PDF document text
    • https://heks-tech.com/app/webroot/userfiles/files/28155936219.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=jim+crow+laws+and+educationPDF 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_off0000fca4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCA4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000114bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114BB 10708 bytes
SHA-256: df49073efd436a0b1ac39458e47fa39fb083e0277d3144daff7d7937af2543f5
font_02_sfnt_off00012d5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D5D 18608 bytes
SHA-256: 75d45c45a5d63cf82175f6c65e330df0cce5a7db1d299e786e8fe630392a3657

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