Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee45e6009cb754d6…

MALICIOUS

PDF

147.1 KB Created: 2021-03-14 11:44:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: eba28080a0dcc5ae617bbd3cb2f721e7 SHA-1: d27a01b43e86b54414f7ae18408cff66a71889b0 SHA-256: ee45e6009cb754d69a674e5b196083244df976fab998c47ce6af9390d8fffada
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to a phishing site or download further malware. No scripts were extracted, but the PDF structure and URL analysis point to a common phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://ponafet.ru/strik?utm_term=how+would+you+deal+with+an+extremely+disruptive+student+in+one+of+your+lessons PDF link annotation
    • http://maxobujixeweden.sportsontheweb.net/sowixuligosegoponesi.pdfIn PDF document text
    • http://viwoxufegoger.sportsontheweb.net/vilaki.pdfIn PDF document text
    • http://xovuwowim.mypressonline.com/alternator_diagnosis.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455890/normal_5fea1cb39fc33.pdfIn PDF document text
    • https://cdn.sqhk.co/nujudemugipi/iihfjin/bugsy_below_deck_real_name.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455380/normal_5fd09f2e8728a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377388/normal_5fec2f7fbf8e3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375083/normal_6038113db7de3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383452/normal_5fedbe9cd1786.pdfIn PDF document text
    • http://nakozek.mypressonline.com/swingline_heavy_duty_stapler_90002_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/zirigajer/jqRh7h8/pokawitinepipawudowiratiw.pdfIn PDF document text
    • http://rumepado.mypressonline.com/is_the_dragon_ball_z_kakarot_dlc_free.pdfIn PDF document text
    • http://newonesitel.22web.org/posav.pdfIn PDF document text
    • https://cdn.sqhk.co/vimewiki/igdhfAu/81483087785.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/cd72e11c-a9d7-4fa3-a5d4-3e14c892afd5/estimate_the_mean_and_range_from_a_grouped_frequency_table.pdfIn PDF document text
    • http://xuxusemo.epizy.com/20217303536.pdfIn PDF document text
    • http://jifejibi.epizy.com/ap_biology_lab_report_sample.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5446089e-51e6-4126-8e77-ed69cfa3013e/ingenuity_portable_swing_reviews.pdfIn PDF document text
    • http://zezofakarol.myartsonline.com/what_are_the_purpose_of_technical_report_writing.pdfIn PDF document text
    • http://wasutin.epizy.com/when_god_winks_at_you_audiobook.pdfIn PDF document text
    • http://texatopewewew.epizy.com/internet_radio_show_format.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71028b4b-7c07-4806-b13b-efbe856af68a/53542645094.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02f92f83-a62e-4507-bf12-cee6946aa5e5/how_long_should_i_warm_up_before_weight_training.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_off0002013b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2013B 5564 bytes
SHA-256: 8c17d6d791283732e91b69946502131ff3f7151f81ca6755573b37a1991d4ccc
font_01_sfnt_off0002141d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2141D 12084 bytes
SHA-256: a9995ec6eafdee208b8b2f04bfd4248341e30cd681603081608d7afa9cd979af