Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce5c4ba1062ed8fd…

MALICIOUS

PDF

83.5 KB Created: 2021-09-16 14:18:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 2412b2a0efc861d76ee7c8748b9eccab SHA-1: fbfd1d51330101690b3c4bf76f58e53f6c07eecc SHA-256: ce5c4ba1062ed8fd0f0cc7df0c7e10e2bff7c63efc43ea1040ce6d4545baec32
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious or phishing pages. The presence of embedded URLs and the nature of the heuristics strongly suggest this document is part of a phishing campaign, likely using a lure related to 'sexy video call app download' to entice clicks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://chcial.ru/uplcv?utm_term=sexy+video+call+app+download PDF link annotation
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613494c3f0498---mapoluwipi.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/161354caf34409---nawolot.pdfIn PDF document text
    • http://yasairamenbar.com/uploads/files/gowapukek.pdfIn PDF document text
    • http://temple.mo/userfiles/file/gosevakovefi.pdfIn PDF document text
    • https://aslplastic.com/ckfinder/userfiles/files/sojonope.pdfIn PDF document text
    • http://minerva-collection.net/files/files/93225672244.pdfIn PDF document text
    • http://xn--80aafkqcanfpgnhbng3b5i9a.xn--p1ai/pict/file/82256905617.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/1613ebb9bba1ce---54072621758.pdfIn PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/1cb5353a65af1a0cd22adba7931c30af/lovipaveworu.pdfIn PDF document text
    • http://msnladyboy.com/ckfinder/userfiles/files/zegeviwatatatigunole.pdfIn PDF document text
    • https://inprovitbrasil.com/ckfinder/userfiles/files/41662979766.pdfIn PDF document text
    • http://sweatrinserepeat.com/ckfinder/userfiles/files/mifepudetitumemapagujilab.pdfIn PDF document text
    • http://mishor-uvk.com/uploads/files/91775588747.pdfIn PDF document text
    • http://innotec-industrie.be/userfiles/file/86152735109.pdfIn PDF document text
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/161425b0610bde---zaxotowukiromejemupog.pdfIn PDF document text
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614300bb63ac8---75793339693.pdfIn PDF document text
    • http://app0.linkeo.it/ckfinder/userfiles/files/sukozi.pdfIn PDF document text
    • https://dammesliepas.lv/ckfinder/userfiles/files/lutatutibuwolewiwoj.pdfIn PDF document text
    • https://jancsoalapitvany.hu/ckfinder/userfiles/files/45289434182.pdfIn PDF document text
    • https://coffeetuanvang.com/Images_upload/files/tufagebarudatavarababiwa.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16138c07c927ed---telikugofupo.pdfIn PDF document text
    • http://sameiroeventos.pt/ficheiros/69118959897.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_off0000dfe6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFE6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f7f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7F8 19104 bytes
SHA-256: 068c0ebff43914977654495e206f784194624061d945436d1320a7d121dc3d0f
font_02_sfnt_off00012853.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12853 10584 bytes
SHA-256: b164fcb81040541c1cb30144e445beffbb02b9d701bd15155567f917fead72ab

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