Malicious PDF — malware analysis report

Static analysis result for SHA-256 30cf5bcf659a059a…

MALICIOUS

PDF

78.1 KB Created: 2021-09-06 16:08:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: f0b7a18813a58dcd84034ba302e4d94d SHA-1: c59b22cc05737d53c9f23043b2f4a55da2537b75 SHA-256: 30cf5bcf659a059acb065ea4c6f45e4928902331edb79c1f4ee2211baab8d8e6
156 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many of which point to compromised websites or disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

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 http://fogathajtohirek.hu/fckfiles/file/mevukijitojiwa.pdf In PDF document text
    • http://www.grundys.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160da21bcd7b00---safegig.pdfIn PDF document text
    • http://abacusnancy.com/userfiles/file/wetojikalozafanage.pdfIn PDF document text
    • https://tecnibat.net/uploads/archivos/ditubavovifinoz.pdfIn PDF document text
    • https://kurek-rowery.pl/user_pict/file/777723272.pdfIn PDF document text
    • http://emotionpicturesfestival.gr/userfiles/file/walidanipogo.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1611d861b16414---48961692862.pdfIn PDF document text
    • http://dalboncostruzioni.it/userfiles/files/72860604445.pdfIn PDF document text
    • http://chanakyaaerospacedefence.com/userfiles/file/wugirikukewepe.pdfIn PDF document text
    • http://kimhoatra.com/upload/fckimagesfile/72930758164.pdfIn PDF document text
    • http://galsabino.it/userfiles/files/27591891689.pdfIn PDF document text
    • http://yulintimber.cn/d/files/46897663479.pdfIn PDF document text
    • https://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/t0fuh7u3058h8p1r14dq7fou0p/77713407725.pdfIn PDF document text
    • http://anhuishangbiao.com/upload_fck/file/2021-7-10/20210710091517497931.pdfIn PDF document text
    • http://firegallery.ru/img/upload/5149944822.pdfIn PDF document text
    • https://daleplumbinginc.com/wp-content/plugins/super-forms/uploads/php/files/cc38799228577bcb0726068066ab32cb/basizoran.pdfIn PDF document text
    • https://bdaudit.ro/userfiles/file/36636011804.pdfIn PDF document text
    • http://tevukasveza.lt/ckfinder/userfiles/files/75154608077.pdfIn PDF document text
    • http://szyuangang.com/UserFiles/file///gasonexelon.pdfIn PDF document text
    • http://ipceurope.eu/assets/file/zijodenoguvumazarubeme.pdfIn PDF document text
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/160719a5eb7a20---74625677314.pdfIn PDF document text
    • https://trsoftyazilim.com/genelresimler/file/sapazusowasijexug.pdfIn PDF document text
    • http://www.dkmodels.net/ckfinder/userfiles/files/50230289628.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=beda+sel+hewan+dan+tumbuhan+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://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_off0000d0f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0F0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e907.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE907 10828 bytes
SHA-256: 920d574615fd9f9ad2beb4855a79d3d098d0bd58b561298826e8ca0fd0fd5bda
font_02_sfnt_off000101a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101A6 15972 bytes
SHA-256: df217258a556261528f6e9ef5cfb242b70e13595b1ea95a4d9563a2f3c142438