Malicious PDF — malware analysis report

Static analysis result for SHA-256 46655f446e317fe7…

MALICIOUS

PDF

91.4 KB Created: 2021-03-23 16:24:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: a8e732b8fbd0cabba9fb547e5eb4d1aa SHA-1: edd51570a0ffc1ed7de88c42917a770ea5c8d04d SHA-256: 46655f446e317fe7dcc18968c36591142c3d5b6dd16f548e5ed0684416db35c0
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to disposable domains and are part of a link farm, suggesting an attempt to redirect users to malicious content. The document body, though heavily obfuscated, contains text related to 'Elementary book report form', likely a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://pelibifir.ru/123?utm_term=elementary+book+report+form PDF link annotation
    • http://lurodug.iblogger.org/types_of_waste_to_energy_technologies.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386095/normal_5feeb4940fa17.pdfIn PDF document text
    • http://pikogoxo.iblogger.org/mathematical_practices_posters.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407057/normal_5ffa41edafd40.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485450/normal_601b0b385deb6.pdfIn PDF document text
    • https://cdn.sqhk.co/wepenujofow/ngjghhi/goal_goal_tips_of_the_day.pdfIn PDF document text
    • http://daritibule.iblogger.org/69246950332.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388833/normal_5ffda088e4d9c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475866/normal_5fd637eeda912.pdfIn PDF document text
    • http://piruzinomezobif.22web.org/gowipamu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403948/normal_6046bde998c4a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471488/normal_5fd7f3e14b36a.pdfIn PDF document text
    • http://zizaburixakog.iblogger.org/tisupivujitoma.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413564/normal_6011e07555f1c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418167/normal_6050fc1c8ae28.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460950/normal_600d0de903722.pdfIn PDF document text
    • https://cdn.sqhk.co/kapimetavis/hcgfiev/dallas_cowboys_cheerleaders_performance_2017.pdfIn PDF document text
    • https://cdn.sqhk.co/xenojepezere/hcgfYs4/gevobox.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zupenafud/78282989426.pdfIn PDF document text
    • http://valamujunitun.epizy.com/44191266458.pdfIn PDF document text
    • https://s3.amazonaws.com/jalasilunaz/28402459042.pdfIn PDF document text
    • http://zoxejotemop.rf.gd/hubspot_marketing_software_certification_answers_2018.pdfIn PDF document text
    • http://kurejaj.epizy.com/ragnarok_mobile_hunter_guide_falcon.pdfIn PDF document text
    • http://doruxujegajaso.rf.gd/fisakogegadagupikegafitig.pdfIn PDF document text
    • http://konevimojo.epizy.com/how_to_day_trade_penny_stocks_for_beginners.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_off000126b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126B1 5132 bytes
SHA-256: a16f97e9a63b2c31cec2ef91c0e1171047b4f29bd398b53caf51c55e83dc62e3
font_01_sfnt_off0001381b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1381B 11732 bytes
SHA-256: 798d4689f255ef6847074bc7aa5cc5a0988415fd17c4646efe5eda611519c52c

Open this report in the interactive analyzer, or submit your own file for analysis.