Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e7028dfed4afa79…

MALICIOUS

PDF

88.2 KB Created: 2021-09-16 10:50:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 549d23563a6be01fa3fa78c58f2a0221 SHA-1: a70e83a075cab3333ec12146200b7b7750c708f3 SHA-256: 0e7028dfed4afa7996adccc80a31628a6f88b1577fdcbbc82513f79eecf4524d
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous URLs that form a link farm, with some pointing to compromised CMS upload directories, suggesting an attempt to distribute or host malicious content. The presence of a 'download button' heuristic further supports a lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

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 https://huntic.ru/uplcv?utm_term=twilight+1+full+movie+watch+online PDF link annotation
    • http://ebbers-schilderwerken.nl/uploads/files/93751360297.pdfIn PDF document text
    • http://tokyoto.pl/UserFiles/file/25373539805.pdfIn PDF document text
    • http://pentas.eu/userfiles/file/kewugixegaramevajuwi.pdfIn PDF document text
    • https://thuhuonglacquer.com/uploads/news_file/puximosakavezas.pdfIn PDF document text
    • http://avandcie-energy.fr/ckfinder/userfiles/files/46915040972.pdfIn PDF document text
    • http://fitviewer.com/files/file/82717583418.pdfIn PDF document text
    • http://slmj8.com/data/userfiles/files/pavomipipinaje.pdfIn PDF document text
    • http://harringtonandlombardi.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/kokomuvorovipivoji.pdfIn PDF document text
    • http://le-bouquet.be/userfiles/files/tufiluzovadelamip.pdfIn PDF document text
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/a4198556bf3558f0f1e7d439e868e24e/xuxibezidazor.pdfIn PDF document text
    • http://www.nbc.com.vn/ckfinder/userfiles/files/19877619213.pdfIn PDF document text
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/8abe40bbcb1e5ed243490b47355d1ded/3810521197.pdfIn PDF document text
    • http://niezapominajkowo.eu/userfiles/file/lomerofozofelafiwa.pdfIn PDF document text
    • http://one9five.com/userfiles/files/tewisogebi.pdfIn PDF document text
    • http://www.mearesandassociatesllc.com/siteuploads/editorimg/file/5779838532.pdfIn PDF document text
    • http://maschimaurizio.it/userfiles/files/65986144114.pdfIn PDF document text
    • http://xn--pr3b03lcdvwu9dpynqkc.com/DATA/file/20210916134440.pdfIn PDF document text
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1614262ed5bd2f---bepumixijumojifi.pdfIn PDF document text
    • https://tranhtreo.com/images/ckeditor/files/60350548937.pdfIn PDF document text
    • http://sushiloverca.com/uploads/files/pawupogivelamujepolunafa.pdfIn PDF document text
    • https://granitabrasive.com/editor_up/zajukulebuvidin.pdfIn PDF document text
    • https://winpoasia.com/ckfinder/userfiles/files/lebutuveb.pdfIn PDF document text
    • http://lineshare.net/upload/files/20210902040510.pdfIn PDF document text
    • https://denimder.org/resimler/files/5481002039.pdfIn PDF document text
    • https://aarushimukhwas.idealviews.com/userfiles/files/xeketipugixosujobivag.pdfIn PDF document text
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d6b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6B1 16632 bytes
SHA-256: e896d0c9c6509c93731645541c0836c845742b74f7fde2e8ff5e94baacc6a6a0
font_01_sfnt_off0000ee3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE3E 19020 bytes
SHA-256: 673537db183ef98d491197608efe4f42dffb78b3813135f173ba0b6626ad6ab3
font_02_sfnt_off00012049.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12049 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00013860.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13860 10780 bytes
SHA-256: 94cd1333f792b8429a07d9b984bf4bef29547d88b9732fc778bde303f01e67f2

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