Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e9cc5a7ddde309f…

MALICIOUS

PDF

81.4 KB Created: 2021-09-16 13:45:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: be21ec705bb49dea62e4e26eaffa3983 SHA-1: 4e5ff6bae23bb7aee077518e5618927815c4e6be SHA-256: 6e9cc5a7ddde309f7fbd4dffefb809dc63903603179af096c6e78e5d9e9a4fbb
164 Risk Score

Malware Insights

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

This PDF file was detected as malicious by a machine learning classifier and ClamAV. It functions as a link farm, containing numerous URLs pointing to various websites, some of which are hosted on compromised CMS upload directories. The presence of multiple links on disposable hosting and the use of UTM parameters suggest an attempt to lure users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://a1-automotivegroup.com/upload/files/3900935994.pdf
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ead02233c6---6252104733.pdf
    • https://h16hr15k-h19hr37urn.com/contents/files/zibozunuzetewum.pdf
    • https://serrechevalier-skifun.com/imagesfile/mewesasapeluximubaxavo.pdf
    • https://jackinthegymtpe.com/uploads/files/202109130805594001.pdf
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/04b129a1965aa730fe8ecf1c124cf0f4/40454013165.pdf
    • http://xn--80aesyq.xn--p1acf/files/file/66629413696.pdf
    • https://woodfur.in/userfiles/file/89610700072.pdf
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135a86e570d6---pawawovuzu.pdf
    • http://irs-messtechnik.at/upload/5711672313.pdf
    • http://ashole.hu/UserFiles/File/kiruvapof.pdf
    • https://recapress.com/ckfinder/userfiles/files/gikakegafed.pdf
    • http://mecateengenharia.com.br/ckfinder/userfiles/files/vanirukavukikidirazivowo.pdf
    • http://ambvetfanini.eu/userfiles/files/47171673113.pdf
    • http://accessibilite-salle-eau.com/ckfinder/userfiles/files/88939976265.pdf
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/4892c6fe0e3477e0723477510c8c8fcb/xaxolejukinetajawet.pdf
    • http://vertracapital.com/uploads/files/vozesoniramuxatok.pdf
    • http://parmalab.it/userfiles/files/lajetid.pdf
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/b4cea821bb3b431848f6d938e88d2108/topefajadivitobejinezaro.pdf
    • http://neteyes.eu/editor_up/zajuxazu.pdf
    • https://atlaskvartir.ua/data/uploads/files/6511494085.pdf
    • http://gowowdeli.com/uploads/files/5827965075.pdf
    • http://markjfox.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/73475849085.pdf
    • http://yushendesign.com/images_fck/file/1630742261.pdf
    • https://www.le-domaine-de-hauterive.fr/ckfinder/userfiles/files/guwatuvipudemewunowitoge.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=vmix+video+editor+apk
    • 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_off0000d770.bin
60dfc12d46a8ea09543ab3fb7ad913f002bc0b737a7afdc756095442aa96f4a8
pdf-font-stream PDF embedded font (sfnt) at offset 0xD770 18452 bytes
font_01_sfnt_off00010836.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10836 16792 bytes
font_02_sfnt_off0001204d.bin
6503165b7710d4b2850bf03957d9b5c46d5fd2d0e9dfb371bc129e281f00120c
pdf-font-stream PDF embedded font (sfnt) at offset 0x1204D 10464 bytes