Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1e5f28b89ce4865…

MALICIOUS

PDF

77.2 KB Created: 2021-03-05 14:47:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 49b439fd70b9ebc410883674757aa270 SHA-1: 8b6d839a310d821287173db7b2376f92430eaf48 SHA-256: f1e5f28b89ce4865bf089eb60c1e1afe37d8fea2b6061a4e19a83f8f7dc1491b
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, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which point to disposable domains and are structured as link farms, suggesting an attempt to distribute malware or phish for information. The document body, though heavily obfuscated, appears to be a lure related to language learning, which is a common tactic for social engineering.

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://druttle.ru/wb?keyword=learn%20urdu%20through%20english%20in%2030%20days%20pdf PDF link annotation
    • http://tcerkovniekupola.space/immunization_exemption_form_ontario_canada1rdi8.pdfIn PDF document text
    • http://prizinsta.info/bangla_autocad_2010_tutorial70xzf.pdfIn PDF document text
    • http://vomojagibolib.iblogger.org/famous_books_and_authors_list_2018.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496816/normal_60168a0478b11.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366007/normal_60132c173bb82.pdfIn PDF document text
    • http://kawolamekepe.22web.org/50806127831.pdfIn PDF document text
    • http://zirekafeti.iblogger.org/beautiful_profile_pic_for_whatsapp_dp.pdfIn PDF document text
    • http://jozebemi.iblogger.org/restricted_reporting_for_domestic_abuse_victims.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484639/normal_5fd1ac26cee90.pdfIn PDF document text
    • http://7lessons.space/how_to_do_pen_and_ink_wash1ktyh.pdfIn PDF document text
    • http://fepigubigi.iblogger.org/32586664412.pdfIn PDF document text
    • http://xuzevofut.22web.org/29113907873.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402519/normal_603abf4a3df2f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463552/normal_5fe1a3043752f.pdfIn PDF document text
    • http://apparently-home.com/haber_processj3p26.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476751/normal_602d7f474212a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vexukaxazixaxet.epizy.com/80703852360.pdfIn PDF document text
    • http://gogibesu.rf.gd/16545601508.pdfIn PDF document text
    • http://kadorekamik.rf.gd/vokavanogezigitap.pdfIn PDF document text
    • https://s3.amazonaws.com/debiwelof/behringer_europower_pmp5000_powered_mixer_manual.pdfIn PDF document text
    • http://pavinudoj.epizy.com/bim_360_design_collaboration.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubifirigevi/zufojagixogulumafixo.pdfIn PDF document text
    • https://s3.amazonaws.com/gozifep/canada_visa_form_5257e.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_off0000f054.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF054 5652 bytes
SHA-256: b89e9951a66b2e7924d21d282db31428bccf42a595f1e6356b2b54f17e31e15f
font_01_sfnt_off0001039d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1039D 10516 bytes
SHA-256: f950bae15b752c336fb243f4a9f125eb17e89520027edb36b6c598f812f9a3f9

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