Malicious PDF — malware analysis report

Static analysis result for SHA-256 49fffa4a8b9f7997…

MALICIOUS

PDF

75.6 KB Created: 2021-04-04 10:54:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c35dded0594d4501cbdba6e7b1fcf106 SHA-1: 847639467d80723f37718838cd53e154bd017ba2 SHA-256: 49fffa4a8b9f7997d6fa6fd79c6bfed143f5b6192e8bc22a336c0561210ff32b
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 0.9991

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://ponafet.ru/wix?keyword=dairy+foods+cde+exam+answer+key+2018 PDF link annotation
    • http://femonejigajape.mywebcommunity.org/10350127131.pdfIn PDF document text
    • http://merogerofame.66ghz.com/58418577009.pdfIn PDF document text
    • http://xilexevu.scienceontheweb.net/que_es_el_acido_glutamico.pdfIn PDF document text
    • http://timinome.getenjoyment.net/88063757499.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454670/normal_5fda4542bb526.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456389/normal_5fd9608c91dff.pdfIn PDF document text
    • http://pinixubezanamot.iblogger.org/38220347251.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497078/normal_6049c2144c8b7.pdfIn PDF document text
    • http://panedapupugaxe.22web.org/beauty_and_the_beast_original_story_french.pdfIn PDF document text
    • http://gosepakaf.getenjoyment.net/direction_of_electric_current_and_magnetic_field.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://losalevova.epizy.com/44417275941.pdfIn PDF document text
    • http://nupakavidowux.epizy.com/81859229023.pdfIn PDF document text
    • http://wowaluw.epizy.com/gopibut.pdfIn PDF document text
    • https://0aa989e7-076c-475f-bc22-fff5ae310860.filesusr.com/ugd/b44be6_f46f88426da2461bbd460dea2f97636e.pdf?index=trueIn PDF document text
    • http://nufeluzuxaluw.epizy.com/62916724818.pdfIn PDF document text
    • https://e26dc784-fa46-4601-9f6d-57686faaf216.filesusr.com/ugd/c66525_cf6df274283e42e3b47daad312dfee74.pdf?index=trueIn PDF document text
    • http://fowimifefezujo.myartsonline.com/bidikajesawazaduruwezu.pdfIn PDF document text
    • http://rixojitudoj.rf.gd/96281108310.pdfIn PDF document text
    • http://govujetimavex.epizy.com/lagu_konco_turu_arlinda_putri.pdfIn PDF document text
    • https://769966b8-4adc-437e-bba8-f198cf6e171b.filesusr.com/ugd/41a0b6_d162f69d44514341a0f0ce008fbb59ae.pdf?index=trueIn PDF document text
    • https://203e7bc3-08d7-4ecc-a8df-f797e0d4a079.filesusr.com/ugd/d4579c_53231e2b94404fdea2959a5dc5273160.pdf?index=trueIn PDF document text
    • http://ralenosozizog.epizy.com/english_speaking_course_free_download_in_gujarati.pdfIn PDF document text
    • http://redepulevinevux.epizy.com/local_broadcast_receiver_android.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d89a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD89A 5688 bytes
SHA-256: d8195a95e2063592204beb0aad982eee149bb74129fb610d542122d2b63cebd2
font_01_sfnt_off0000ec02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC02 10868 bytes
SHA-256: 3d90bcd37d082ac723538d4e3b8d0046ba61eba7a9e1a2e5b5dffa8a3d11c971
font_02_sfnt_off000110f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110F3 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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