Malicious PDF — malware analysis report

Static analysis result for SHA-256 00b5d68f4630ec79…

MALICIOUS

PDF

96.2 KB Created: 2021-09-17 17:46:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 2011735c3923e476b5d2d5d1163e9896 SHA-1: 26096873b864a4e2e243761a38d43689d3e5c23d SHA-256: 00b5d68f4630ec79025dabd3e5cd2bdb42d82a9b051fa5a3437b66f1044eaa6f
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories or are hosted on disposable domains, indicating a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9820

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 http://buyyoutubelikes.com/ci/userfiles/files/wutebiwikezatavoza.pdf In PDF document text
    • http://speckletrack.com/update/editor/file/xewusidefenimaxi.pdfIn PDF document text
    • http://capesociety.ca/uploads/files/ramogirofot.pdfIn PDF document text
    • http://drprdesaihospital.com/uploads/jogen.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/34388794831.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/161405c1144052---rofikufanenel.pdfIn PDF document text
    • http://autoscuolepintozzi.it/userfiles/files/83806483018.pdfIn PDF document text
    • http://www.ondebiz.com/userfiles/file/moxusudugadawotizemilaga.pdfIn PDF document text
    • http://fuku-zou.com/userfiles/file/xemunugitelilasedituvi.pdfIn PDF document text
    • http://www.museopizarra.com/ckfinder/userfiles/files/58122682920.pdfIn PDF document text
    • https://cam-ceeds.org/ckfinder/userfiles/files/pufiradewuze.pdfIn PDF document text
    • http://k-sta.kr/FileData/ckfinder/files/20210903_F47B3B2E88FF6E08.pdfIn PDF document text
    • https://barcelona-health.com/files/galeria/files/8810261212.pdfIn PDF document text
    • http://xiangzhuan.tw/upload/files/26730255340.pdfIn PDF document text
    • http://prospekt-rostov.ru/ckfinder/userfiles/files/zajipalupuf.pdfIn PDF document text
    • http://cpk.by/ckfinder/userfiles/files/85978520725.pdfIn PDF document text
    • https://belitour.ir/basefile/belitourir/files/74188174983.pdfIn PDF document text
    • https://jager-ig.tw/up_photo/file/mofoniretovineboxot.pdfIn PDF document text
    • http://one9five.com/userfiles/files/18494250744.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c1ff215b85---11967728556.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/16132c93b18aa6---lujaxekapu.pdfIn PDF document text
    • https://cqhuaan.myhost360.cn/upload/files/09-09-05-34-20-49.pdfIn PDF document text
    • http://inphilong.com/upload/files/noxelusifovijajegeseke.pdfIn PDF document text
    • http://elsekmont.eu/userfiles/file/kasalerojuwidufobutebiw.pdfIn PDF document text
    • https://macintosh-szerviz-javitas.nuttydog.hu/ckfinder/userfiles/files/70385901191.pdfIn PDF document text
    • https://cmflower-kkc.com/ckfinder/userfiles/files/56855206267.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=your+my+boss+full+moviePDF 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_off000114f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114F1 17964 bytes
SHA-256: 2eb3b32a26d0b3510886b588348834a31bd362b242ddaa7d7f3bdb5910ada082
font_01_sfnt_off0001435f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1435F 10412 bytes
SHA-256: e078102f5cb76ce08922f356000a42c976420514ad4a41ab608299bbb8f054a0
font_02_sfnt_off00015b04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15B04 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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