Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e7677d5ce0005a0…

MALICIOUS

PDF

96.9 KB Created: 2021-07-20 10:36:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 60f8ebd5c1f57b9c9af6a79085886fc7 SHA-1: ad70dc31863b57c6ee52542a6ca694d3bdc6b75a SHA-256: 9e7677d5ce0005a0f28fff0fb34cce7fee9e4b0741b77e00e004186accc37a85
156 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs that point to compromised CMS upload storage and disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the presence of numerous external links is the primary indicator of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9806

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://arket.io/wp-content/plugins/super-forms/uploads/php/files/vnr3457nnm7kh0ms348delg16b/dusemodevego.pdf In PDF document text
    • https://cakenflowersonline.com/userfiles/file/48743389694.pdfIn PDF document text
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/3e6efce3889f32aac2ff56040642e157/34668184554.pdfIn PDF document text
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/f7010465982c5f58938e298b8e466f7f/zesigakavamejojozij.pdfIn PDF document text
    • http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609632bbe5b69---favekododulujisevuj.pdfIn PDF document text
    • http://woodsfamilypride.org/clients/2/2c/2c83419adcf4927d74d3defe18342386/File/gopuloxasetitixas.pdfIn PDF document text
    • http://chinazzjx.com/d/files/79431245802.pdfIn PDF document text
    • http://giasuthienphuc.com/Images_upload/files/funusajix.pdfIn PDF document text
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/0a820d50258c71b6c0f8c11373d65b6c/maburevukavu.pdfIn PDF document text
    • https://islandsvefir.is/wp-content/plugins/super-forms/uploads/php/files/31k5sp39c60o79dd4pipnvjb60/leruvegom.pdfIn PDF document text
    • https://mylodge-naoshima.com/fulevovigexe.pdfIn PDF document text
    • http://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160887191626bf---jemufemow.pdfIn PDF document text
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/n1kib3m68afi30b8ch35im41v3/xuvuperevi.pdfIn PDF document text
    • http://herfon-machinery.com/images/ckfinder/files/20210720010347.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a1701aea546---rafotujumeguweter.pdfIn PDF document text
    • http://joyearland.com/ckfinder/userfiles/files/81294224782.pdfIn PDF document text
    • http://buckleyfamilyofdarling.net/clients/0/01/017bf228c8331327bdfb67b1798bff80/File/20873883115.pdfIn PDF document text
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/59fa46a3b4600420cf802116cf5a181c/51904953264.pdfIn PDF document text
    • https://luyenthitoeic.info/userfiles/file/39597907883.pdfIn PDF document text
    • https://genesislighting.net/wp-content/plugins/super-forms/uploads/php/files/60cfd31bc17dbbe4757a66097be9b65c/45619572195.pdfIn PDF document text
    • http://capital96.com/userfiles/file/20753881247.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/sofuv.pdfIn PDF document text
    • http://csc010.com/userfiles/file/20210705065642_lyhgg5.pdfIn PDF document text
    • http://cbgnfinance.com/userfiles/file/sipokagew.pdfIn PDF document text
    • https://riolospettacoli.it/filesUploads/file/sovetudufex.pdfIn PDF document text
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/03f711be0716d0b43d9bdf828c1a02bd/32683490608.pdfIn PDF document text
    • https://www.escon.it/wp-content/plugins/super-forms/uploads/php/files/8655562ce5fe716e0b395b1ff33fc232/punefiwidasiloxiwakoj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=is+a+killer+whale+a+fishPDF 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_off00011b28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B28 16896 bytes
SHA-256: f298b46dfebb554d23a50c63e09a0619186f0460da4f304a3d2ec1de9c6c50cc
font_01_sfnt_off0001477b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1477B 10116 bytes
SHA-256: 8c6a02d3b0ea9bf01c13daf1d1770cab4e394eaea260d778b4986e29c4c2d37a
font_02_sfnt_off00015e38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E38 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1