Malicious PDF — malware analysis report

Static analysis result for SHA-256 94245a09961d3b68…

MALICIOUS

PDF

90.3 KB Created: 2021-09-23 10:15:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ccc7bba6e64e9f8e76da50c62b772776 SHA-1: d2ad3df4b932f1ce4c7b5eb178b1bd0ecda33847 SHA-256: 94245a09961d3b689994e7429f91b11496417e8c3ce34cab422fc7b127fa4921
164 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for Pdf.Phishing.Trojan. The presence of numerous links pointing to potentially compromised websites and disposable hosting suggests a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and link farm behavior indicate it's designed to redirect users to malicious content, likely exploiting PDF vulnerabilities or social engineering.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://dobrejaja.com/Upload/file/21639914759.pdf
    • https://cashcruis.ru/wp-content/plugins/super-forms/uploads/php/files/bfb5c8f5962dde30235d5c96320de408/1573059214.pdf
    • http://naturestuff.nl/siteimages/file/ruxobev.pdf
    • http://psystems.gr/Administrator/uploads/userpics/OutPostImages/files/84550301891.pdf
    • https://vegas-shop.net/uploads/files/nimegewevotejoxorug.pdf
    • http://mirsistem.com/depo/sayfaresim/file/fadafekuzuvaborisekibu.pdf
    • https://corcreation.twbiz.me/data/fckeditor/files/20210906_231127.pdf
    • http://applexin.com/ttpsea/files/file/79379118007.pdf
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/2fa43b06970775143c0b0b80828a158a/xuzunogijemosonavuluv.pdf
    • http://goldenpeak.it/userfiles/files/25021852324.pdf
    • http://binhchuachay.info/Images_upload/files/rezipidofo.pdf
    • https://glozor.com/userfiles/file/wamodotom.pdf
    • http://gespk.com/userfiles/file/80434883456.pdf
    • https://resortweeks.pro/userfiles/file/96764042951.pdf
    • https://forssh.com/userfiles/file/tonevagatozepesavunatezos.pdf
    • https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/fecca2eb346941a9ce8ddca3d750da39/80268106950.pdf
    • http://makassitools.com/userfiles/file///90479738126.pdf
    • http://pmke.cz/pictures/files/kejitagepugabatavabonu.pdf
    • https://soudurelausiere.com/upload/editor/file/6312434041.pdf
    • http://tryinvest.eu/userfiles/files/nikuwad.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=watch+the+conjuring+3+online+123
    • 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_off0000f852.bin
999d5ba9092a0b6636ac4e865b0405b5490f7daf11adcd409207bebc78d6d9b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF852 19372 bytes
font_01_sfnt_off00012acd.bin
a19bd2fcd4307fc28cc9fa7049ec41b4a5db8817491e36774e60ec10193c280a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12ACD 10908 bytes
font_02_sfnt_off0001441b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1441B 16792 bytes

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