Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e706cd4854a2f5d…

MALICIOUS

PDF

85.0 KB Created: 2021-09-01 10:12:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 38085198100b06052ae6c678d1829cb7 SHA-1: 32ac309b42f31cd765480df22583f74c51f27c1c SHA-256: 6e706cd4854a2f5d80cea6edc3a905fa0dc3d5c8542181e0dee32d6959e70b42
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, with heuristics indicating it is a payment redirection lure. The document contains numerous links to external sites, many hosted on compromised WordPress installations, suggesting an attempt to redirect users to malicious content or phishing pages. No scripts were extracted, but the overall structure and heuristic firings point to a phishing or business email compromise attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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 https://qualitylightsolutions.com/wp-content/plugins/super-forms/uploads/php/files/864cbc89656ca65a8de615465fb89746/42316758394.pdf In PDF document text
    • https://refour.dk/wp-content/plugins/super-forms/uploads/php/files/f48a190cd79db10ca42e28114564186b/tedaf.pdfIn PDF document text
    • http://d4sontario.com/clients/e/ed/ed023a0734c265ca673a92d1d81de675/File/sogejonivexuweziw.pdfIn PDF document text
    • http://www.biharikft.hu/bihari-admin/ckfinder/userfiles/files/tazikuvilugemod.pdfIn PDF document text
    • https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/2b7738fa272412629edd965a360016f8/neluxezexuzir.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/ff5067b21d9e776a9bc269a10b51c45b/9185249786.pdfIn PDF document text
    • https://swagath.co/new/ckfinder/userfiles/files/dufobamoraxiwumazoj.pdfIn PDF document text
    • http://velo.hu/UserFiles//file/filajixifadavonokazaguw.pdfIn PDF document text
    • https://engineeredrepinc.com/wp-content/plugins/super-forms/uploads/php/files/daec7192b0e691aaf8478afa3498c90b/8611333007.pdfIn PDF document text
    • https://datxeninhbinh.com/data/dulieu/files/33714858623.pdfIn PDF document text
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/f2b7e9cc375ab47df22ab82e82a23b69/retuxizanago.pdfIn PDF document text
    • http://www.romanschatztruhe.de/img/files/58848846115.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160c947be61e98---wodomevudanokawajavomidu.pdfIn PDF document text
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/160aab3e00ea3e---xexoxavevodafubetamosaxow.pdfIn PDF document text
    • http://mama-care.com/UserFiles/file/zasamudakopujimusakuvelax.pdfIn PDF document text
    • https://tranduongauto.com/app/webroot/files/images/pages/files/wufetawedadelozik.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a3fbac0a6ef---zakibuzi.pdfIn PDF document text
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5156fe3ab6---21231852708.pdfIn PDF document text
    • http://dainichiji.com/upload_ckr/files/69971443900.pdfIn PDF document text
    • http://www.radanhorse.com/resource/files/juxekigewowuwabobom.pdfIn PDF document text
    • http://thy-environment.com/userfiles/files/50070463320.pdfIn PDF document text
    • http://orgue-chantepie.info/FCKeditor/upload/file/tudiganazimapazerosot.pdfIn PDF document text
    • https://unitedfightalliance.com/ckfinder/userfiles/files/89807723218.pdfIn PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/160c1da122aecb---texawosowimijemuxajumu.pdfIn PDF document text
    • http://nature-revive.org/files/file/vibebave.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=tax+on+selling+landPDF 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_off0000e938.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE938 17684 bytes
SHA-256: 8bbe457264a5008a0a238a8c3ce5c63d608dfcb209000b4f046de5148c72dbcb
font_01_sfnt_off0001172d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1172D 10288 bytes
SHA-256: 5854e8bab8fcbeb8312cfbe46e0e9c16ebf6af27b1399f30c2f96c5a5f801bc3
font_02_sfnt_off00012e44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E44 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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