Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cc8a60faf19be51…

MALICIOUS

PDF

87.9 KB Created: 2021-09-03 21:45:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 5bc07e4627b4db3ec34c66abac3e078a SHA-1: 51c4e5473e5fabfc36a18598c147ffe72969e1fe SHA-256: 0cc8a60faf19be5115ffe483e03eac37f673003a1d58a1ed535a07df8de71694
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a large number of embedded URLs, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The presence of these links indicates an attempt to lure victims to external sites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://catamma.ru/uplcv?utm_term=tefal+freemove+cordless+iron+manual PDF link annotation
    • https://biothiennam.com/media/ftp/file/zuxovufilozuvo.pdfIn PDF document text
    • https://popa.com.br/wp-content/plugins/super-forms/uploads/php/files/be7548cb1f6f835c25d2afbc95a4fbce/zudobekisogoxufafabin.pdfIn PDF document text
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/1169e0c99122915abc51256fc6aac0e6/3643088474.pdfIn PDF document text
    • http://baloneacessorios.com/_upload/file///4161585309.pdfIn PDF document text
    • https://gabconstruction.com/ckfinder/userfiles/files/14381241111.pdfIn PDF document text
    • https://higher-reason.com/wp-content/plugins/super-forms/uploads/php/files/k7rapjg6fbnlvtt5uemejh3dbu/78656372760.pdfIn PDF document text
    • http://studiopol.it/userfiles/files/83765966703.pdfIn PDF document text
    • https://armagedonspedycja.pl/files/file/36786622415.pdfIn PDF document text
    • http://thanhlapcongtykiengiang.com/upload/ck/files/neruloginikoxug.pdfIn PDF document text
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/tg50docegpllf3mkeoi1mfk04p/25532086800.pdfIn PDF document text
    • https://immo-cjeanpaul.lu/userfiles/files/50850384877.pdfIn PDF document text
    • http://yournamebadges.com/withyourdog/cms_uploads/file/17240404332.pdfIn PDF document text
    • http://www.buildingmalawi.com/images/uploaded/documents/87450858478.pdfIn PDF document text
    • http://soc-in.com/data/media/files/xibabepo.pdfIn PDF document text
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/902f87535dc18490481596fa52d14028/11385337067.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb0cc625c6d---xoruzowalorinasopujo.pdfIn PDF document text
    • http://abnicum.ru/files/file/dogawenadezifivi.pdfIn PDF document text
    • http://fratellibeninca.com/images/file/23323801328.pdfIn PDF document text
    • http://beijingxinzhi.com/userfiles/file/20210512220142_1948516898.pdfIn PDF document text
    • https://delcinfo.ru/img/files/files/baviturezixun.pdfIn PDF document text
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/3210dd7759ba85efae6845ee72d560da/56883691236.pdfIn PDF document text
    • http://www.depomatrial.com/file/78615940250.pdfIn PDF document text
    • 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_off0000eb19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB19 20636 bytes
SHA-256: 2b524782a5a3b8a58a70437a73da4778cea1e7f4936e474115c9c8aabce78ab7
font_01_sfnt_off00012182.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12182 10668 bytes
SHA-256: 89fedd43799bd83fc85fa787fcae94bd103b634c0a60f08f69ad4f88f29381c0
font_02_sfnt_off000139ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139EE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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