Malicious PDF — malware analysis report

Static analysis result for SHA-256 09a10732c2c0038c…

MALICIOUS

PDF

85.4 KB Created: 2021-09-01 07:08:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: f0b482792a7ba005b4da8480b9ded7ca SHA-1: c61f45877ec67e5af2cf5ddb878f3b785e9c711b SHA-256: 09a10732c2c0038c30c6b6b580f718e589d03b295939c6c786a2e1817ee2105b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised WordPress sites or disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the nature of the links and the PDF structure point towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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://archism.ru/uplcv?utm_term=wordscapes+level+99+pass+3 PDF link annotation
    • https://termokingbt.com/ckfinder/userfiles/files/tafoz.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ddf9de8a19---lanebewivojatexopisejojos.pdfIn PDF document text
    • http://sjhrz.com/images/upload/File/wiwifodegovuvutesopuveto.pdfIn PDF document text
    • http://warraichmeats.com/wp-content/plugins/formcraft/file-upload/server/content/files/160789b2634dfc---60628983903.pdfIn PDF document text
    • https://poolpoint.be/uploads/file/xusodusajige.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160be3338e0911---dutotegetinalovo.pdfIn PDF document text
    • http://www.dean-cpa.com/files/adminpic/file/29568340185.pdfIn PDF document text
    • http://kaitosushisb.com/uploads/files/2641716009.pdfIn PDF document text
    • http://dobrasekacka.cz/userfiles/file/xamawojuzizozusupibadet.pdfIn PDF document text
    • http://forumts.com/ckfinder/userfiles/files/34242028008.pdfIn PDF document text
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160becc3a1207d---zidexefobalodavuzi.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/1bb009971ebef927bd9699a86d827776/gubufasalusoxi.pdfIn PDF document text
    • http://kfoodntea.com/dataroom/file/lowudipewovel.pdfIn PDF document text
    • http://freewest.at/3309095634.pdfIn PDF document text
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/2a400ab42e7f92cca8b09ba072e2a95b/1223398830.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/1608af9de400b9---volabesaxuzikilisowi.pdfIn PDF document text
    • https://e-tta.com/app/webroot/userfiles/files/84179306270.pdfIn PDF document text
    • https://istanbularicilikfestivali.com/upload/ckfinder/files/xeneravaro.pdfIn PDF document text
    • http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160960eb128fdd---zejasuwusegosadafi.pdfIn PDF document text
    • http://upbfassadenbau.com/upload/file/33453394191.pdfIn PDF document text
    • https://avela.md/userfiles/file/79673820306.pdfIn PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/160900c079148c---goxisasejesinoruwuzodo.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/1ba49ea98806a6b077e6c0a1fa2eb3f3/funomotuxesizug.pdfIn PDF document text
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/22m7up3jj8g7tfef077i5o23gk/gamipap.pdfIn PDF document text
    • https://damiel.eu/userfiles/file/petenod.pdfIn PDF document text
    • http://bsbcarpet.com/userfiles/file/javapimekik.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_off0000e7e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7E5 18352 bytes
SHA-256: f4bafef3e3e18ad5f8f699f0dd89c9241ec0b210a5132e6b14599194444a6118
font_01_sfnt_off000116e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116E4 10612 bytes
SHA-256: 383ca9fbd7be554b042ba3b7e2d1da4201975e78fe5e9e01c71ecc840c18327a
font_02_sfnt_off00012f57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F57 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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