Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c5bd121f88b1b8e…

MALICIOUS

PDF

244.8 KB Created: 2021-07-06 16:43:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0f3438d8924b34e68aab41c158c1d324 SHA-1: d9603b95ebc317456027df817714150a21c06b59 SHA-256: 6c5bd121f88b1b8e64c7856c498640696b8206466d44e800412bc3a7246a122d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, with heuristics indicating it contains a link farm pointing to compromised WordPress upload storage. The embedded URLs suggest an attempt to redirect users to potentially malicious sites, likely for phishing or further malware delivery. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with common phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9800

Heuristics 5

  • 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.
  • 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.chiringuitomediterraneo.com/ckfinder/userfiles/files/14607724497.pdf
    • https://kildevangen.dk/files/5721717891.pdf
    • http://art-lan.ru/uploads/assets/file/74181893857.pdf
    • http://vetranhtuong.info/luutru/files/55706516809.pdf
    • http://lucchetta.net/userfiles/files/12337164262.pdf
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e56f77a05b---69282930663.pdf
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/16084f64dbd232---ruzezewurebolofavawa.pdf
    • https://socialchangefactory.org/wp-content/plugins/super-forms/uploads/php/files/73e26cc05ad3351c187c4c824ad01158/wikazapuxodudulofedaferit.pdf
    • http://geoplan.su/userfiles/file/47337412011.pdf
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/032701adf5c5c9f7d4e99318ff34d836/30064915634.pdf
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b02e7032736---lisuk.pdf
    • http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607925132935d---41716712468.pdf
    • https://signika.pl/Upload/file/tolenilexazarugoxeta.pdf
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087757001867---polomuwewaber.pdf
    • http://dlzj.net/upload/files/20210611073547722972.pdf
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/d7548fcf0d3d950f3f4708595f27c82b/sunawuridaraxupogepu.pdf
    • https://catwalkdogcome.com/editor_upload_image/file/sebosudokuvufotesumikutu.pdf
    • https://bfull.ru/uploads/files/21361461298.pdf
    • http://nsfeed.com/_UploadFile/Images/file/sunawamixoxi.pdf
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/160a8a87264c8a---43498357358.pdf
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/7b8deee7a5746762b739398751529600/nomagizebinumafuwavakisaz.pdf
    • https://tedvandergulik.nl/userimages/file/jupipigipesenazarub.pdf
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160755da89335c---57401253636.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=pokemon+mystery+dungeon+explorers+of+sky+key
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0003553f.bin
ea42a592cfeafab73bdf8a52721380c03e14800426a222eed78d77e0e97db043		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3553F 19200 bytes
font_01_sfnt_off0003883a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3883A 16792 bytes
font_02_sfnt_off0003a047.bin
3cd4407960bf55184d68d11a61f7f157dd494499bff119ae6743a92deeb2a49e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3A047 2424 bytes
font_03_sfnt_off0003aaf3.bin
b4582595d8b43ed8854950ea948f9300a261809589b9a39dee918f1c0d4a37f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3AAF3 10996 bytes

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