Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2de6b105f74e7e9…

MALICIOUS

PDF

117.1 KB Created: 2021-06-28 14:19:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 256207dbf0bbdebe3f95504a01dae98c SHA-1: d6c342906c8e6a297c35783af33ad66f64586bcb SHA-256: b2de6b105f74e7e93afbc9446794e69b1b6ca3b6534c79316ae4ac2ee1c2302c
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to compromised websites or disposable hosting, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious content or downloads. No scripts were extracted, and the document body was unreadable, limiting further analysis of the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://gongotour.com/FileData/ckfinder/files/20210610_C0D3CF87BADC081D.pdf
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/16076614183d28---8287310988.pdf
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/vh1d2d1ijst68bod1mjh7c1ruq/7594692081.pdf
    • https://lotteppta.com/beta/assets/file/zusebi.pdf
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/160aed40da8883---74430766895.pdf
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/6618fc1c08f9c18121dc8eba2060b068/26369249804.pdf
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16098a71fe9da0---77981028767.pdf
    • http://blissrenewbeauty.com/newerac2c/userfiles/file/xibezubibe.pdf
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070f1c3d6fca---gedapupamudi.pdf
    • https://yastudio.net/wp-content/plugins/super-forms/uploads/php/files/e0a02e92cbfc192f56070cb7d44fdda5/ratamuxogogiborujakiromax.pdf
    • http://ccforum.kr/uploads/file/1623782072.pdf
    • http://www.empresasdelimpeza.info/wp-content/plugins/formcraft/file-upload/server/content/files/160bfaa1f046b4---rarararaludo.pdf
    • https://aprilboya.com/userfiles/file/midukamupuvunawusute.pdf
    • http://tilestone-pools.com/i/File/7221675214.pdf
    • http://www.bluewhaleline.com/image/upload/File/fovelukumujupaba.pdf
    • http://hyderabadibiryanicorner.com/admin/images/file/50570352797.pdf
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e9739eb62c---20095966298.pdf
    • http://noithatnhapkhaugiasi.com/luutru/files/xoruregeva.pdf
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/d1323d1df265463c687075222587fac6/1747476536.pdf
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/et6eiima26bqg6bqtvlc1h9p6i/sewunijuwavajatirebugafoj.pdf
    • https://specialbrands.gr/wp-content/plugins/super-forms/uploads/php/files/f4be7d8e1e8c0887009b0635ad1aef32/putelemefowan.pdf
    • https://imagebeaute.fr/userfiles/file/81789891533.pdf
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607535ea0dbc9---nonepekidovijorese.pdf
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f513272dbc---85457988097.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=introverts+that+act+like+extroverts
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001688d.bin
b3c3f640bf447bd4e744872f25c7df8f2b274739c2306488abc2a48455115554
pdf-font-stream PDF embedded font (sfnt) at offset 0x1688D 17760 bytes
font_01_sfnt_off000196fa.bin
dc604a25ce77552ac74c1f1c723a13a286144a9f68db0b556c2a44964c710025
pdf-font-stream PDF embedded font (sfnt) at offset 0x196FA 10536 bytes
font_02_sfnt_off0001aef6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1AEF6 16792 bytes