Malicious PDF — malware analysis report

Static analysis result for SHA-256 97bda62cf3a48c93…

MALICIOUS

PDF

78.8 KB Created: 2021-03-13 16:00:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 18c93ea84badf4bbafaff714075a6d64 SHA-1: dfebd5d8d25bdd1632284ea470fc8bad30cb9e5f SHA-256: 97bda62cf3a48c93f78c18c2ca9babed1ac1b4597c4f7b63c563ea31e87decc3
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://midufefew.ru/123?utm_term=university+assignment+title+page+template PDF link annotation
    • http://sozaxesugoj.mywebcommunity.org/57555637914.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454982/normal_60171311ea9c4.pdfIn PDF document text
    • https://sabiwivilo.weebly.com/uploads/1/3/4/3/134316676/roxuludog_pojibununutigex.pdfIn PDF document text
    • http://vimebadu.22web.org/microsoft_certifications_path_2020.pdfIn PDF document text
    • http://retamos.mygamesonline.org/harry_potter_wooden_wands_amazon.pdfIn PDF document text
    • http://nosilekexiwot.mywebcommunity.org/rurag.pdfIn PDF document text
    • https://gikatufezido.weebly.com/uploads/1/3/4/3/134338368/b7980be4d308.pdfIn PDF document text
    • https://livaganomin.weebly.com/uploads/1/3/4/3/134399079/bb9d531.pdfIn PDF document text
    • https://ziziwatir.weebly.com/uploads/1/3/4/7/134713039/7116413.pdfIn PDF document text
    • https://dodoxatufasiw.weebly.com/uploads/1/3/2/6/132681482/damunovove.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478387/normal_5ff062dfc7f08.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bixagolowetuf.rf.gd/pesowijubeliriwejoja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd7ccd03-74c9-47f7-a27f-0b3f3adf6405/how_to_set_up_a_ventilator_machine.pdfIn PDF document text
    • http://pitonisude.epizy.com/mumafoxa.pdfIn PDF document text
    • http://gobipumedijesi.epizy.com/41718533440.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2c5979c-6304-4236-8ecf-b68a5f540769/43683238856.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b13b494-0585-4cf8-830d-6499fd1e0038/how_to_cook_with_zojirushi_rice_cooker.pdfIn PDF document text
    • http://davivizuvazofa.rf.gd/cpctc_worksheet_solve_for_the_variable.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe6ffc95-4df7-4b6c-a5dc-da502f85d2b7/bujovonilufuzatobajaza.pdfIn PDF document text
    • http://rolavamaget.rf.gd/blank_emotion_wheel_printable.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f747.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF747 5292 bytes
SHA-256: 0d8264f11239dbeaa50de62407aa312a3d4dd62fbd4c170ae04890e24e7d7810
font_01_sfnt_off00010944.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10944 10624 bytes
SHA-256: 371aa98d94a4873929413d2d3950757deacab3ca990d7b4dc74941c36e3c091e

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