Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f00e183eb470fc9…

MALICIOUS

PDF

87.1 KB Created: 2021-03-30 02:47:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 3ec9a2575c9a802a6d803b6a19375cff SHA-1: 5af1a8f55c5c0aea22ea7b22622162e0f5f04620 SHA-256: 3f00e183eb470fc97a6460e2abc65c8ec26bdeda7d4db4e1792e73babcdbb20a
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://lozipotod.ru/award?keyword=l+alphabet+phonetique+francais+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366959/normal_6016aa235b831.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420028/normal_5fcd02a32d51f.pdfIn PDF document text
    • http://mitutepoka.medianewsonline.com/14421690235.pdfIn PDF document text
    • http://rezumitisud.mygamesonline.org/zaxanomotusajesabotuj.pdfIn PDF document text
    • http://film123watch.com/the_gods_of_eden_free_download50dot.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413475/normal_5ff2187bd6bca.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://jokubamobivavum.onlinewebshop.net/joindre_excel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/372c737d-04a5-4102-902e-97604b8999ed/5518144002.pdfIn PDF document text
    • https://aabf49e0-5477-4fd2-8456-a986ef8f2a87.filesusr.com/ugd/9e14ca_72da103fe3e4484d9cb0d27f1ae36584.pdf?index=trueIn PDF document text
    • https://04a9e765-cf69-4035-9b9a-998d8fb4e692.filesusr.com/ugd/8c5016_bb70bdc82af44d7fb3e1afd322f5a0af.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kawotexulozax/marketing_strategy_of_apple_iphone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8e0f145-00c8-47f6-8115-b58fc528359d/trigonometry_formulas_for_jee_mains.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af432ce7-9970-44d7-b2e6-4ef62e3aaedc/maths_book_class_9_ncert_solutions.pdfIn PDF document text
    • https://d6b7b3c7-8429-4d82-9d75-5d5d09e763cc.filesusr.com/ugd/a8c229_580635b40e7e44cf81ff6e29a88984fb.pdf?index=trueIn 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://scripts.sil.org/OFLIn 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_off0000e6db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6DB 5332 bytes
SHA-256: ffcc3cf9d35c1311da04cd009ddbad52a0b65d4fdc09a86855e35fc1511a6f4a
font_01_sfnt_off0000f8e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8E3 16208 bytes
SHA-256: 3e7f52ba789d00d655d945dcb4b241a442500fc220bc901d9e7d5e65d6747fd8
font_02_sfnt_off00012976.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12976 16316 bytes
SHA-256: 1e856db8f0458c31512b51031f814aba84b9538d7c40d57e44c3d24fb754bbe2
font_03_sfnt_off00013f3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F3D 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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