Malicious PDF — malware analysis report

Static analysis result for SHA-256 1207c55d72c4a762…

MALICIOUS

PDF

101.3 KB Created: 2021-06-27 07:28:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 6fb486699140576ac8657a915a918487 SHA-1: 0e4ee5188cc91c406cec00c1fc6d87e3870cc2c3 SHA-256: 1207c55d72c4a762ce5975d244d3dbc59915fd09713d5d29c26a73965bc72c8b
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. It functions as a link farm, containing numerous URLs that point to compromised WordPress sites, likely to host malicious content or phishing pages. The presence of these links suggests an attempt to lure users to external, potentially harmful resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 6

  • 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 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://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/4a8445f688a7265185acdf512138feb3/rekamexisafukusirofewixi.pdf In PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a04e1b54a9c---livolosutoresarot.pdfIn PDF document text
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7a49d0f2c6---54897359502.pdfIn PDF document text
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/fe165292f0b68bab8a5cb3345d22bd04/xabenerasupefazuxovot.pdfIn PDF document text
    • http://bonfiremadigan.com/uploads/fckeditor/file/88225008182.pdfIn PDF document text
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160abf5d0473f4---41785985428.pdfIn PDF document text
    • http://imbirimbir.ru/files/77302737581.pdfIn PDF document text
    • http://anbao.vn/uploads/userfiles/file/24615463124.pdfIn PDF document text
    • http://ngocvietbungalow.com/upload/files/40041963840.pdfIn PDF document text
    • http://tofuyatogo.com/uploads/files/tutebipij.pdfIn PDF document text
    • http://xn--vb0b83rba554gca.kr/page_data/file/20210515124955.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d2035957606---mutunevakavovelabodogopu.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afccf478697---zegifozix.pdfIn PDF document text
    • https://www.harasportcenter.com/wp-content/plugins/super-forms/uploads/php/files/ljluoeh4kn91tb4of7dijki6b1/6661806146.pdfIn PDF document text
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/7c0a7hdt42ljuv44dkqbi8reem/23984763921.pdfIn PDF document text
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d8d69490de---ronojujavebaxibirexem.pdfIn PDF document text
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/16083e484a0691---24935264835.pdfIn PDF document text
    • http://aucoindeshalles.com/menu/file/40055999384.pdfIn PDF document text
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/4ep912hi9a3rkqicph7ho4qvs5/xumidirujam.pdfIn PDF document text
    • http://painttechvina.com/webroot/img/files/mumurobudazuxol.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=edward+poon+barristerPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001097b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1097B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012188.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12188 9712 bytes
SHA-256: ff6ff5aecc95e7200ca0bdd3129142d7ac31f798396f6d82810dfb5200da65c4
font_02_sfnt_off0001404d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1404D 10548 bytes
SHA-256: a6f47ea4f362b1062f27075c0ab64fdf44c3443ed558c6406d22433e819fc05e
font_03_sfnt_off00015844.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15844 17732 bytes
SHA-256: 2ef59b4df2b2b902186a3391d38ab5aead08e318e8853ce67e40d4a36d9c3273

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