Malicious PDF — malware analysis report

Static analysis result for SHA-256 014e75d00c068079…

MALICIOUS

PDF

82.9 KB Created: 2021-09-10 10:25:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 4b064a156dbd0c1e4c4b0001782cf039 SHA-1: 2460f16a5dacc9922f500b2353335513660b0ae2 SHA-256: 014e75d00c06807991299df6c6dadf09e6c336443a13ce051eacf24a0c623a71
244 Risk Score

Malware Insights

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

This PDF contains embedded JavaScript and numerous links to external PDFs hosted on compromised CMS upload directories and disposable hosting. The SE_PAYMENT_REDIRECT_LURE heuristic indicates the document's content is designed to trick users into believing there are new or changed payment instructions, a common tactic in business email compromise schemes. The embedded JavaScript likely facilitates the download and execution of a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 9

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://medicentrumnz.eu/medicentrum/files/file/penonudozijaxo.pdf In PDF document text
    • https://webtechnocrats.com/upload/file/pejibobonagujonu.pdfIn PDF document text
    • http://eviljoy.com/UserFiles/File/neroponeja.pdfIn PDF document text
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/7148b12b89f1bdf50c183e80209624bd/30098246071.pdfIn PDF document text
    • http://vzwsportenmuziek.com/content_docs/bonufezeretamudex.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/16136be857d85f---7041344021.pdfIn PDF document text
    • http://prime42.ru/userfiles/files/62263946023.pdfIn PDF document text
    • http://mygotour.com/FileData/ckfinder/files/20210903_0F50A4851BD42719.pdfIn PDF document text
    • https://hediyelikhanem.com/calisma2/files/uploads/74436089322.pdfIn PDF document text
    • http://siamintertrade.com/file_media/file_image/file/19422864560.pdfIn PDF document text
    • http://chongthamphucthang.com/images/news/files/jawofezatagotav.pdfIn PDF document text
    • https://museuminiaturesbesalu.com/files/11794429568.pdfIn PDF document text
    • http://detskypohar.cz/upload/file/zidaviwukunaze.pdfIn PDF document text
    • http://knx-shop.ru/admin/ckfinder/userfiles/files/46531094041.pdfIn PDF document text
    • http://salkim.com/userfiles/file/vinizolusoz.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/cvd4omv6svr57tuig5vr1jn8h6/9574951158.pdfIn PDF document text
    • https://vnjhanoi.com/upload/files/75252507372.pdfIn PDF document text
    • https://mygoaltv.com/ipp/images/uploads/files/vadotalifi.pdfIn PDF document text
    • http://szzxwx.com/Upload/Upload/file/202195101436147.pdfIn PDF document text
    • https://hbfilm.ca/resimler/files/janukomugaxim.pdfIn PDF document text
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ed344d370c---bepupiwaxugedoj.pdfIn PDF document text
    • http://plusk-car.com/js/upload/files/67803262519.pdfIn PDF document text
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/2j0b2pi914gs7smdh9nqu3vli7/mepisifopufeziketekuda.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613aea86597cd---49962803675.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=android+apple+tv+mirrorPDF 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_off0000e030.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE030 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f847.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF847 10432 bytes
SHA-256: 7281701663b77dfd5384b111b48fea491b495edefe4a93729219f39f0151a046
font_02_sfnt_off00010fdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FDC 17828 bytes
SHA-256: fc6adb50f1a92fefd3352dd684c02fe0a930e06502094490cbff73f5b6335dea

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