Malicious PDF — malware analysis report

Static analysis result for SHA-256 17d648ad4df0e7bb…

MALICIOUS

PDF

68.3 KB Created: 2021-09-12 07:38:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 214719f2bac25da6d81350749df02694 SHA-1: da315d433d75d5514816fd48bffdbb67eb45c70f SHA-256: 17d648ad4df0e7bb439d41b7a44f0a86cb210739099b022f084f4b5df364afed
176 Risk Score

Malware Insights

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

This PDF exhibits characteristics of a phishing lure, including being image-heavy with minimal text and containing numerous links. Several heuristics indicate it points to compromised CMS uploads and disposable hosting, suggesting an attempt to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1613c324e094b6---diwukumiz.pdf In PDF document text
    • http://qqsbg.net/uploads/file/93666160547.pdfIn PDF document text
    • http://barudan.hk/UploadFile/file/20210911215650340.pdfIn PDF document text
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/16133f48c9fc17---47365136472.pdfIn PDF document text
    • http://barrospizzadb.com/uploads/files/19437885572.pdfIn PDF document text
    • https://mikludava.lt/images/files/juvewekedodisokidavabi.pdfIn PDF document text
    • https://ecpa.fr/uploaded/file/42954264282.pdfIn PDF document text
    • http://vimar.ua/userfiles/files/xorixonixezubiwedupixefef.pdfIn PDF document text
    • https://sailstudy.in/ckfinder/userfiles/files/nifiwilawivo.pdfIn PDF document text
    • https://travelinnsuites.com/nbloom/fckuploads/file/71309717598.pdfIn PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/166154c1895a76ce985b6f6c83325fa7/sefutawozugar.pdfIn PDF document text
    • http://jfe.hk/userfiles/zajerowelore.pdfIn PDF document text
    • https://bravo-hk.com/userfiles/file/gigedogudurovi.pdfIn PDF document text
    • https://renfrewareahealthvillage.ca/ckfinder/userfiles/files/netedutid.pdfIn PDF document text
    • http://abnig.friendship-match.com/upload/files/59618710199.pdfIn PDF document text
    • http://allier.proximeo.com/ckfinder/userfiles/files/90640100982.pdfIn PDF document text
    • http://ozkayalartrans.com/userfiles/file/93294103657.pdfIn PDF document text
    • https://bor-diing.com/upload/files/89543368107.pdfIn PDF document text
    • http://thietbikhachsanvinhhung1.com/upload/files/zunutisalim.pdfIn PDF document text
    • https://parc-hotel.info/file/jazinozemig.pdfIn PDF document text
    • http://saothienemb.com/uploads/images/files/43530066472.pdfIn PDF document text
    • https://marblo.com/app/webroot/img/files/8166368559.pdfIn PDF document text
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/151293d5d253fbc07b9abfcd0e799b49/86581709461.pdfIn PDF document text
    • https://dom-titan.rs/files/dasobopolazoduwara.pdfIn PDF document text
    • https://tahitotfalu.hu/ckfinder/userfiles/files/96420678566.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=met+amino+acid+codonPDF 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_off0000b1fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1FD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ca0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA0F 13536 bytes
SHA-256: bfaddf161a3ecf99a008a6faf156fd9c7b71432dc7cab407d1eafff77b122f89
font_02_sfnt_off0000eb10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB10 10212 bytes
SHA-256: 8aa200dbdcdb01df284cd4116775d13e4510a24f0b20eedb2ec9c256a1e7366f

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