Malicious PDF — malware analysis report

Static analysis result for SHA-256 c79bcdcfbc8ddeb5…

MALICIOUS

PDF

79.6 KB Created: 2021-03-23 18:42:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 34a1466fbb03695c1fbbb56d765fc3ce SHA-1: 98c1f058dea407e322047b376a3ae8e1071f7c26 SHA-256: c79bcdcfbc8ddeb595c59a0c9182d500186635542c036c92b684ec02a886b4db
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 0.9997

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://jottigo.ru/wix?keyword=hay+day+free+diamonds+and+coins PDF link annotation
    • http://figuxovutofid.mygamesonline.org/35530001490.pdfIn PDF document text
    • http://famozosivupiwij.sportsontheweb.net/55559044819.pdfIn PDF document text
    • http://wejesigozolireb.getenjoyment.net/75903825593.pdfIn PDF document text
    • http://kulapub.22web.org/17461653346.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495841/normal_5ffbc29f7424e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460058/normal_5fe42dbef33dd.pdfIn PDF document text
    • http://feludekinopotas.scienceontheweb.net/xopikisela.pdfIn PDF document text
    • http://bafedudovodamo.medianewsonline.com/rolesusuxebonidefok.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411245/normal_6037154953fac.pdfIn PDF document text
    • http://pokinusuvato.getenjoyment.net/acknowledgement_in_research_paper.pdfIn PDF document text
    • http://zifeladawu.scienceontheweb.net/76171465963.pdfIn PDF document text
    • http://winokuzovew.iblogger.org/69320806871.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b33e6ec-a375-4006-86f9-9a5dba9658d5/walmart_black_friday_11_14_in_store.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f743d20e-27ae-4b7c-bba9-b4d99643e854/9427678100.pdfIn PDF document text
    • http://lisotabisalak.epizy.com/cg_song_dj_2019_video.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/494196e9-d552-4834-b0b5-285500577c36/geometry_polygons_worksheet_grade_4.pdfIn PDF document text
    • http://suxanovovogemi.rf.gd/59762889450.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/606846e0-ec34-487b-8991-5d6313dc8804/bowflex_pr1000_accessories.pdfIn PDF document text
    • http://pijerogovilowum.rf.gd/wativugowerawal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/333a1bf9-1085-4612-91b2-139d6a63ae06/cuanto_es_100_gramos_de_mantequilla_en_cucharas.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_off0000ef08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF08 5200 bytes
SHA-256: c5bda9852c0571a77ceeff59a7bd822fcf6a640e2410bddbc69893bfebb0fca6
font_01_sfnt_off000100a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100A4 2092 bytes
SHA-256: 0f740872c9ba99ba2808e86ca1aa710947acf25eef927d3004a187dd3557d740
font_02_sfnt_off00010a4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A4A 11388 bytes
SHA-256: 42f33fd3dd79c631e77fe7505bc391ff45f377f404619d47e7fa5627c44018bf

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