Malicious PDF — malware analysis report

Static analysis result for SHA-256 e126def18882368e…

MALICIOUS

PDF

76.7 KB Created: 2021-03-26 00:35:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 4a910769c0785a9a0b555ea6247f0bcd SHA-1: 72a5930b731a528dbb75cae2ebd0b3b5d59ef191 SHA-256: e126def18882368e0680771e74f5060ebf8f0b2bba4b4f1fa1f50e77a8957cf6
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://jacksth.ru/123?utm_term=sql+server+management+studio+2014+sql+formatter PDF link annotation
    • https://cdn.sqhk.co/nevupediwix/3HjehhJ/soccer_superstar_season.pdfIn PDF document text
    • https://cdn.sqhk.co/geroterunetu/jhm2heM/wings_of_steel_sled_hockey.pdfIn PDF document text
    • http://bumadodari.iblogger.org/geological_timeline_activity_answers_key.pdfIn PDF document text
    • https://nozijuga.weebly.com/uploads/1/3/4/6/134698325/fawedomel_gunadi.pdfIn PDF document text
    • https://gibawimeviz.weebly.com/uploads/1/3/5/3/135348906/matewewu_kegux_dufagipokumu_wotaw.pdfIn PDF document text
    • https://lobusejorul.weebly.com/uploads/1/3/5/3/135338183/441976fe90095.pdfIn PDF document text
    • https://depesusexufajev.weebly.com/uploads/1/3/5/3/135351117/divosifizomojir-sivaxegetoleju.pdfIn PDF document text
    • https://cdn.sqhk.co/zaxuloxedu/9X43dHA/96836901004.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://297de083-771a-4730-a3b8-a2afe8c7d209.filesusr.com/ugd/47424f_1ef585d230834dc28e9a42efb950bd87.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dedinavesute/allstate_insurance_company_of_canada_annual_report.pdfIn PDF document text
    • https://61090d85-22e6-4724-b969-52a17785150c.filesusr.com/ugd/952c2e_b736a307b0014944a66a1c56309fb83d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bokexizometun/pegugovanad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/495b35b7-a660-42c9-8618-5cd9c77a2a88/brady_bmp21-plus_error.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b45b746b-c150-4ea8-824d-9d2a6ec926c8/46793479747.pdfIn PDF document text
    • https://s3.amazonaws.com/kukazowox/ejemplos_de_funciones_logicas_anidadas_en_excel.pdfIn PDF document text
    • http://kibozitasosisan.epizy.com/84939272184.pdfIn PDF document text
    • http://dunosijeg.epizy.com/woxagikevolilixigixeb.pdfIn PDF document text
    • https://s3.amazonaws.com/kobivimelelo/was_the_night_before_christmas_poem_words.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4181272c-fe15-4874-b819-16702e8b7f8a/how_to_sell_training_programs.pdfIn PDF document text
    • https://6205d428-d5dc-494e-bbc3-e2236f9d811e.filesusr.com/ugd/6885a6_18ab8b5be00f44fb8b270b62cae5efdf.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fidefofudi/59054698630.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_off0000ec19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC19 5932 bytes
SHA-256: d05f6d4e71ea99d3ea75668725d51180a0a92fe9d2b2f67d7fa044cf31a465d5
font_01_sfnt_off00010038.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10038 10748 bytes
SHA-256: 16a1e4afd1100fa4ab2a54c40cccf81a822718cc5ad8a41f9c7d6808f9e43cf7

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