Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb97b354d6867c82…

MALICIOUS

PDF

83.4 KB Created: 2021-08-16 22:37:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 6fedd274b5fbf61355a6881432126a9c SHA-1: 2eef6c50338f8e8edbb6dd1bf98519bd00416e30 SHA-256: bb97b354d6867c82c53ce94296aa1df3885e70ba51c5ba2ff5c8468322e7d43d
164 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier indicating a high probability of maliciousness. The document contains a link farm pointing to compromised WordPress uploads and disposable hosting, suggesting an attempt to distribute malicious content. The presence of a 'Download Now' lure further supports a phishing or malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://alrabbancapital.com/file/files/fokukukelebanuruwam.pdf In PDF document text
    • http://technocom.pl/editor/file/lujejuseduvog.pdfIn PDF document text
    • http://smit-electronic.hr/upload/datoteke/85076700576.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609689f198835---wozujujedodubutifetup.pdfIn PDF document text
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607005be13c46---rewozasulajegufojibe.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160ee77bf11057---xigitukedulapawajegexowa.pdfIn PDF document text
    • http://55thocscompany.com/clients/62662/File/80849130315.pdfIn PDF document text
    • https://123natura.com/stockages/files/lulanamuteru.pdfIn PDF document text
    • http://shipsupply.ru/userfiles/files/69726545609.pdfIn PDF document text
    • http://riggi.ru/userfiles/file/genemapumedigigiroxifefa.pdfIn PDF document text
    • http://fluitec.fr/ressource/site-image/files/65896505433.pdfIn PDF document text
    • https://aslimitada.com/userfiles/file/jululiwukogoziwawozufa.pdfIn PDF document text
    • http://ecohort.com/userfiles/files/geresuvuku.pdfIn PDF document text
    • http://gingerbreadvillage.org/clients/e/e3/e396b250b60561adcb946853f9f62e29/File/xarorukoje.pdfIn PDF document text
    • http://bienchidan.org/uploads/files/nilizusodilekiwodu.pdfIn PDF document text
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160788ba1e5ea1---15796257254.pdfIn PDF document text
    • https://iohrp.org/f_files/files/pebiwiruvu.pdfIn PDF document text
    • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/6ae3019e928ec8663c5fd5ab79d37c0a/mibarenelapetul.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608e05b603ba7---fufekozifigurogedud.pdfIn PDF document text
    • http://carbonelite.ru/file/ledorajukarub.pdfIn PDF document text
    • http://amirafouad.com/uploaded_files/file/53349830210.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c92b6ae88e---7470202648.pdfIn PDF document text
    • http://samrayburnclassof1980reunion.com/clients/873185/File/87363595810.pdfIn PDF document text
    • http://cpbnatation.fr/fckeditor/userfiles/file/zufafuso.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=ielts+essential+guide+british+council+audioPDF 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_off0000e07d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE07D 10840 bytes
SHA-256: fce9022f331c58a3a3bddb0a88f07d84a843cd3dbccb56a4c7dd0ab773889ca7
font_01_sfnt_off0000f939.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF939 16600 bytes
SHA-256: 9d90366179f53255718493fa46508ba758bd2bc90b7f091102d273579229da72
font_02_sfnt_off0001245b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1245B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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