Malicious PDF — malware analysis report

Static analysis result for SHA-256 572841ea1a96aa55…

MALICIOUS

PDF

83.7 KB Created: 2021-04-16 14:05:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 4bde04a0a116fed6ac4c6b3b6c00fbff SHA-1: 57aa7b357fe656655aa10db2865a746078229941 SHA-256: 572841ea1a96aa5543cf007cee027782158d5597a0401c4ca369c1d4a7f92046
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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xezojetit.ru/strik?utm_term=ge+50+pint+stratus+grey+dehumidifier+with+built-in+pump+-+aper50lz PDF link annotation
    • https://cdn.sqhk.co/gujipiror/0HBKjaY/ziwaban.pdfIn PDF document text
    • https://jotinebemoti.weebly.com/uploads/1/3/4/6/134681432/f252bd0caffc1c.pdfIn PDF document text
    • http://kedepoba.sportsontheweb.net/air_force_lor_rebuttal_example.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369491/normal_606ab935441db.pdfIn PDF document text
    • http://lebuvowune.getenjoyment.net/pivusivaginikugelupako.pdfIn PDF document text
    • http://rapoxarawiwalo.sportsontheweb.net/totaxuvalidigapezofiji.pdfIn PDF document text
    • https://rovijekamiveva.weebly.com/uploads/1/3/1/4/131437241/tidolepiwogafex.pdfIn PDF document text
    • https://mavosawiki.weebly.com/uploads/1/3/1/1/131163846/gited.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474987/normal_5fce16c526cd2.pdfIn PDF document text
    • https://cdn.sqhk.co/muvasesuru/9jgdDie/learn_javascript_for_web_development_free_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497353/normal_6024756a3b188.pdfIn PDF document text
    • https://sererewaxux.weebly.com/uploads/1/3/4/9/134903335/badek_lesemufuxukubuv_bifexejimu_gotigili.pdfIn PDF document text
    • http://bapikiboz.iblogger.org/hospital_waste_management_thesis.pdfIn PDF document text
    • http://pegejoruvufiron.sportsontheweb.net/18383228598.pdfIn PDF document text
    • https://cdn.sqhk.co/dukoredod/IBhfcgh/43562946189.pdfIn PDF document text
    • https://cdn.sqhk.co/jegamaxegev/l3ie5jh/100_best_heavy_metal_songs_of_all_time.pdfIn PDF document text
    • https://cdn.sqhk.co/kimamena/ciivJGA/46452847306.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://juwovupo.rf.gd/the_magic_of_belle_isle_detroit.pdfIn PDF document text
    • https://s3.amazonaws.com/tesotiwapax/how_to_get_your_ex_back_text.pdfIn PDF document text
    • https://s3.amazonaws.com/lekizopiloref/hr_director_level_interview_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/godoremitiwuja/17422493151.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000103ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103AE 6168 bytes
SHA-256: 704c38a54369b0517610da0e284fab0f2f686ebe84111f03e4971bbb4df10ab5
font_01_sfnt_off000118a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118A6 11908 bytes
SHA-256: 9c5c2fbcd3fe033365dcf336a2ef00d0d86773ab16f71fbcc2dd2e9dc0446064

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