Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7ebc3e902d90b80…

MALICIOUS

PDF

78.7 KB Created: 2021-02-13 02:43:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 92aae575fa55552e78178b700f1bf071 SHA-1: d3152b519eaf0bbe902cd635c75b9780e10caba0 SHA-256: e7ebc3e902d90b8034bf7e77ed9c2b2b77007951ae01efaa541f906704d0c7ad
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://baarspo.ru/123?utm_term=where+there+is+love+there+is+life PDF link annotation
    • http://curvepreloved.com/tenifibaruqjmzi.pdfIn PDF document text
    • https://cdn.sqhk.co/sisadenev/P8GkjgS/crowd_talking_sound_effect_download.pdfIn PDF document text
    • https://gabubogoko.weebly.com/uploads/1/3/3/9/133997439/serisev.pdfIn PDF document text
    • http://kkkirrreeee.space/feasibility_report_preparation_and_evaluation_criteriaktxlm.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446029/normal_5ff3d33ea8f18.pdfIn PDF document text
    • https://cdn.sqhk.co/gesafafo/u2URiiZ/basketball_shoes_womens_white.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414691/normal_6016c523be816.pdfIn PDF document text
    • http://neuroncraft.online/fizeginoxxvd6.pdfIn PDF document text
    • http://mandarins.space/pacific_energy_fireplace_insert_partswzv9y.pdfIn PDF document text
    • https://nudegono.weebly.com/uploads/1/3/4/6/134682657/rawijusaruxege-bobefabib.pdfIn PDF document text
    • http://blacklaser.ru/48495485011zmok4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499942/normal_5fdc7066d8f47.pdfIn PDF document text
    • https://cdn.sqhk.co/sugifila/ijhcjid/28360189243.pdfIn PDF document text
    • https://sepetumeba.weebly.com/uploads/1/3/4/6/134601334/vefagifutijo-sorarexuwasubev-xajaros-duvavapuveguga.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
    • https://s3.amazonaws.com/zulezov/expanding_double_brackets_corbettmaths_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/makixibawumebol/organizing_interview_questions_and_answers.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_off0000ec24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC24 4400 bytes
SHA-256: 578e85a7d13881200e59ea4a607fd0f9d245364e329c75189839923a6700e977
font_01_sfnt_off0000fb35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB35 10756 bytes
SHA-256: efad064898880b65091b4d498bb47d12f9acbc09205f917e6b53e0eb13c9bb58
font_02_sfnt_off00011fc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FC7 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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