Malicious PDF — malware analysis report

Static analysis result for SHA-256 115e60d1a0e9adef…

MALICIOUS

PDF

84.4 KB Created: 2021-07-18 17:21:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 05462e0a081a7a5eef8ff34ff1dbf32c SHA-1: cd7ef29ec8c4d7beb8cbb6f160609c512f20c92c SHA-256: 115e60d1a0e9adef3bd1fc3ba8c2cad7d7647b31b8ce8c9ca79cee113f6b3ac3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://bloomeng.com/uploads/88062763821.pdf In PDF document text
    • http://alnadaoil.com/userfiles/file/19086788715.pdfIn PDF document text
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/93afab42122645d9e6982ed2a390abdd/turetasi.pdfIn PDF document text
    • http://www.sphotobooth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c75f1885df---wajuxijizajusake.pdfIn PDF document text
    • http://www.nomorcantikjoss.com/file/39008619500.pdfIn PDF document text
    • https://iwnta.com/userfiles/file/85626877391.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/1607b4d4430f25---5155913566.pdfIn PDF document text
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/5f66c75a412c2233a31587bf1111d961/47570719623.pdfIn PDF document text
    • https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/227c736225e75bb83560dbc8a8bd4589/71160188604.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d5b08c8fa4d---tudumuzakewi.pdfIn PDF document text
    • https://www.charityweiss.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606c819a536de---kagesaxuxarovo.pdfIn PDF document text
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/82ua2kg3siei2pkpr3p1eao2g8/82845920892.pdfIn PDF document text
    • https://medicinasolidale.org/wp-content/plugins/super-forms/uploads/php/files/ef0c3efc07b48dfc16d6cef44eb21994/76505962417.pdfIn PDF document text
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/4c9a1a2894fea7378e10b96843a83141/munozekaboxobejiz.pdfIn PDF document text
    • http://mastera-mix.ru/ckfinder/userfiles/files/fizij.pdfIn PDF document text
    • https://hoakhanh.vn/uploads/image/files/kololadin.pdfIn PDF document text
    • https://anfauglir.com/images/file/22330198884.pdfIn PDF document text
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/16077f7ce372f6---tufobeb.pdfIn PDF document text
    • https://chameleoncoupons.com/adgprocessing/uploads/files/rosipixetazovipovotuje.pdfIn PDF document text
    • https://beautydiction.com/ckfinder/userfiles/files/xisozexanevevawajupe.pdfIn PDF document text
    • http://noithattamphuong.com/upload/files/zijefidex.pdfIn PDF document text
    • http://improntediteatro.it/userfiles/files/pibofemikuja.pdfIn PDF document text
    • http://pinzimoniofiumicino.eu/userfiles/files/10578837643.pdfIn PDF document text
    • http://amsasecretariat.fr/userfiles/file/61395849870.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=sales+lady+meaningPDF 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_off0000e8d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8D5 10460 bytes
SHA-256: 3134f1ca5f9f74a0c1e62073031d056b17fae419da21fd284e46a827629cd88d
font_01_sfnt_off00010040.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10040 16984 bytes
SHA-256: ab810f6c9f52fab3b2faa1c8919489d7db5266e0928c2fd3166398e80ece332f
font_02_sfnt_off00012c7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C7F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1