Malicious PDF — malware analysis report

Static analysis result for SHA-256 a38633c83eafe718…

MALICIOUS

PDF

196.3 KB Created: 2021-07-02 17:01:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 1319ddbe24823ce15c466ae7be412f80 SHA-1: 3101232c29aa36106404ea61907ba9a82badfe37 SHA-256: a38633c83eafe718917585d4651a3353a79fc0c00c4d28f41db4e0f6a4c5f7c2
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It contains numerous embedded links, many pointing to compromised WordPress upload directories, suggesting a tactic to host malicious content. One notable URL is https://nomylo.ru/uplcv?utm_term=star+of+remphan+bible+verse, which is likely part of the lure or payload delivery chain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9067

Heuristics 5

  • 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.
  • 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://nomylo.ru/uplcv?utm_term=star+of+remphan+bible+verse PDF link annotation
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a62c49c7994---naxinufofisex.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a88098c0163---97186780895.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc9e2d204b---35082343672.pdfIn PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/ca8235baf203b70503f2e796e420909f/83059516214.pdfIn PDF document text
    • https://www.azembay.com/wp-content/plugins/super-forms/uploads/php/files/kp7dov2gts0bhkkqabn2ke9tb1/47980460149.pdfIn PDF document text
    • http://www.cenlajobinator.com/siteuploads/editorimg/file/6951785896.pdfIn PDF document text
    • https://livres-d-art.com/ckfinder/userfiles/files/rijolero.pdfIn PDF document text
    • https://lightspec.com/wp-content/plugins/super-forms/uploads/php/files/41d52dd726b07d6505a01a1f2aace347/4576925980.pdfIn PDF document text
    • https://blnk.eu/userfiles/files/sogukimugodojitigun.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c5ab92927d---fawijazenobaxidujores.pdfIn PDF document text
    • http://an-ocn.ru/ckfinder/userfiles/files/rapijeraxelakijuzat.pdfIn PDF document text
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/c39e31b6cadc5e4179538f3ffea81310/melizamawanerupinaguxab.pdfIn PDF document text
    • http://baigeleather.com/userfiles/file/vuwupolo.pdfIn PDF document text
    • http://posekatzahradu.cz/files/file/76931130598.pdfIn PDF document text
    • https://englewoodgrassfarm.com/wp-content/plugins/super-forms/uploads/php/files/879d3ea1c3ab8f69295c4f578bf59e95/85493827939.pdfIn PDF document text
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/c102ee10e4e7259f0b4975ce22d9664d/wanelevamanip.pdfIn PDF document text
    • http://goodtraefarm.com/ckupload/files/kebutidexutorekigerevuxox.pdfIn PDF document text
    • http://cosmosimpex.com/app/webroot/ckfinder/userfiles/files/972468933.pdfIn PDF document text
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/37c6b0302281c9b37e820345891e3964/fokifiximupawurerose.pdfIn PDF document text
    • http://sysquare.com/UserFiles/files/saxapebafikodiferemedu.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/8dbb1490d80f6019497ea48fc1be1603/junezuxagogizupawo.pdfIn PDF document text
    • http://bandenplaats.nl/cmsimages/file/lizazokoluw.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b2aa949ea0---58669869074.pdfIn PDF document text
    • http://business-plan-capalpha.eu/mbp/upload/images/images/upload/ckfinder/fazonekopusasugewigige.pdfIn PDF document text
    • http://zxsolar.com/d/files/54170646570.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a06b61f29ee---jujaxabewefowiv.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_off0002778c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2778C 28572 bytes
SHA-256: a920fa20c07332f3845ea041b42e2f39f3edeb428d7e016087660f35fc922c27
font_01_sfnt_off0002b77b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B77B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0002cf92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2CF92 10904 bytes
SHA-256: 030b1eabad791ba42145b952515283e2b27764e313ef23529012773a7240ee96
font_03_sfnt_off0002e860.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E860 17436 bytes
SHA-256: 4564cf376e2af8c315888f3be254db8eae059feb15a4ac629398401d8a308080

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