Malicious PDF — malware analysis report

Static analysis result for SHA-256 038c712c53310ea0…

MALICIOUS

PDF

77.7 KB Created: 2021-04-06 13:31:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: a146ef74c178216be5dd53190608b62d SHA-1: e9d208e572dd7ebd9c71ddb50cce5da622be9c08 SHA-256: 038c712c53310ea0d7a79e611198e193e52b64b32201fab8a7f8704c1e3031b2
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 0.9998

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://druttle.ru/123?utm_term=android+9+f%25C3%25BCr+samsung+tab+s3 PDF link annotation
    • http://rabiwitijif.medianewsonline.com/garmin_gns_430_manual.pdfIn PDF document text
    • http://fexerekuvise.iblogger.org/24763089151.pdfIn PDF document text
    • http://fipizilemuwob.medianewsonline.com/far_from_the_tree_hulu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lekedoxe.rf.gd/sentencing_guidelines_uk_section_20.pdfIn PDF document text
    • http://siniligavaxuvul.onlinewebshop.net/cannery_row_book_sparknotes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e366e739-7574-464c-a723-2ef3e24269b0/xetipereseranulodu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/157d455d-da7d-467c-ae18-3bbc95ea5115/bivemanovukuwaluti.pdfIn PDF document text
    • http://gedonisezif.epizy.com/76020017708.pdfIn PDF document text
    • http://kojuvurapamox.myartsonline.com/tusenewuluvejituvoluge.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/386bee25-82a8-4225-8df2-ef2bb7784711/mijenipebef.pdfIn PDF document text
    • https://12c9c681-cafc-4f88-93da-cb6f471fd49a.filesusr.com/ugd/f09a9d_69fb08c8aa4d4b2bb47b2d6b22930811.pdf?index=trueIn PDF document text
    • https://6f1239e7-da96-47bf-8adb-22d47a96a9da.filesusr.com/ugd/bb5a15_418dda1c09c14823b8e48fd4f7f3cf6a.pdf?index=trueIn PDF document text
    • https://b00f38ea-0d13-4519-ab0f-1253f0d03ca0.filesusr.com/ugd/289c5e_33a899c984aa4f55b36de5b4f43aa93f.pdf?index=trueIn PDF document text
    • https://f1ddcea9-c323-452c-a4d3-aaefec61e50a.filesusr.com/ugd/defd8a_2dd631bb62d546c0942416c27ac65c93.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/897737aa-b4cf-4899-bb43-afe0b992330d/29666584094.pdfIn PDF document text
    • https://58552d80-c20c-4e4f-99b9-91bedbcc07a3.filesusr.com/ugd/c18496_008de799ea7746ae9d1dcd928466d8c3.pdf?index=trueIn PDF document text
    • https://a3e8d6b6-68ee-4625-a313-a25a09dbd39d.filesusr.com/ugd/312e12_d584273933d14a328d66ce0b23e2177d.pdf?index=trueIn PDF document text
    • http://mupufuten.epizy.com/critical_care_transport_core_curriculum.pdfIn PDF document text
    • http://japinoxizidunub.myartsonline.com/72085133311.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://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC5E 5764 bytes
SHA-256: de645b04412c702c7518cad3e172416fc79bbcbb0785ca58a3d143669d91afe7
font_01_sfnt_off0000ffb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFB0 11708 bytes
SHA-256: e33a2382a5f81a87d049c115672a4b7f1f382dff2619210f0cb0ce8a21595fc0

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