Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a123290dbc4d972…

MALICIOUS

PDF

79.7 KB Created: 2021-07-23 23:42:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: e020ef1d72c84ce9923f6d24e3a91e0e SHA-1: 722c984026a4a35c1a2cc2445a18dc63c06334f3 SHA-256: 9a123290dbc4d9723f72eb8f240d674fae6b5d960873373ac8dbfb78a339dcdb
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users to malicious sites. The document body is unreadable, but the heuristic firings strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://mudraconsultancy.com/uploads/files/xafevifunex.pdf In PDF document text
    • http://xn--80ahcjevtqq.xn--p1ai/ckfinder/userfiles/files/24147171696.pdfIn PDF document text
    • http://arcomproltd.com/userfiles/file/nigopojirolif.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16070a00d034bc---14522436811.pdfIn PDF document text
    • http://seoulsquare.com/userfiles/file/bemezigaba.pdfIn PDF document text
    • http://goteneplast.se/files/images/file/29527260943.pdfIn PDF document text
    • https://brianhigbielaw.com/UserFiles/file/56819853626.pdfIn PDF document text
    • http://mvhs1964.com/clients/2/20/2030ff4f331b14c2016b95997514b7ac/File/nubogidadizimuwupurezowu.pdfIn PDF document text
    • https://paymentor.nl/uploads//file/98110515443.pdfIn PDF document text
    • https://takeorders.online/wp-content/plugins/super-forms/uploads/php/files/k9kkpg50bnk84mf9le2co1aqk6/fitalefufebaker.pdfIn PDF document text
    • http://4seasonstours.in/userfiles/file/famitugawafinunoludano.pdfIn PDF document text
    • https://olterus.info/contents//files/jagizenajizevajugig.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160adc7e7caa6b---19829072275.pdfIn PDF document text
    • http://middlegeorgiacoinclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607abc98822ba---20687728589.pdfIn PDF document text
    • http://coimbra.hu/uploads/ckfinder/userfiles/files/5990765759.pdfIn PDF document text
    • http://rapabzenec.cz/obrazky/files/33047409758.pdfIn PDF document text
    • http://szjwwj.com/userfiles/file///larorufo.pdfIn PDF document text
    • http://dh-life.com/ckfinder/userfiles/files/7043502242.pdfIn PDF document text
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/160872323ab0f3---86920901674.pdfIn PDF document text
    • http://www.gonouvellezelande.com/files/bogiwurupo.pdfIn PDF document text
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/c916a00bc3e9941c97456b3d57e8020a/62335482801.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160872a573343b---gebafezelogifuzusubavowi.pdfIn PDF document text
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/80fc517d46ba3c9861f37e464f2e95a1/bumakinovagevosik.pdfIn PDF document text
    • http://shukokai-voves.fr/userfiles/file/fogekixuku.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=saraswati+dwadasa+nama+stotram+in+kannada+pdfPDF 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_off0000d2ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2CA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eae1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAE1 10736 bytes
SHA-256: 1767887fe649ea40f09320941bdd8873645a7a642f402202900fb11073da86d3
font_02_sfnt_off00010388.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10388 16288 bytes
SHA-256: 175a980bda8cbfa2093f8c9f61333a8121ad0351ff52d7651d21cc03d584bea3

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