Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bc5c2b40b109c7e…

MALICIOUS

PDF

71.5 KB Created: 2021-04-04 08:08:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 3936d50f722179d8b1df5d67c7a8b4c2 SHA-1: accb7d83496be1557cb06da81c7128c62b36b7b0 SHA-256: 1bc5c2b40b109c7ea0d81d5fd1750f736f049396eb49ab0c8ae10da3154606fa
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 0.9966

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://xezojetit.ru/123?utm_term=juventus+vs+atletico+madrid+highlight+video PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4404490/normal_6009b05ba356f.pdfIn PDF document text
    • http://womovenum.sportsontheweb.net/mcdonalds_breakfast_coupons.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416149/normal_5ff912607748b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369327/normal_602b2449c31e3.pdfIn PDF document text
    • http://freshka.fun/make_it_stick_the_science_of_successful_learning_chapter_2_summaryehjcu.pdfIn PDF document text
    • http://copyrightviolationcenters.com/25182293983a6men.pdfIn PDF document text
    • http://simenomevaxi.iblogger.org/75728271436.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450249/normal_5ff87e2f75121.pdfIn PDF document text
    • http://blog-millionaire.buzz/mini_dv_md80_driver_windows_10z09yh.pdfIn PDF document text
    • http://xasanefajisa.sportsontheweb.net/buxoninogojexajadajol.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473619/normal_5fda732ada79a.pdfIn PDF document text
    • http://smotrikino.fun/kidovabajd8176.pdfIn PDF document text
    • http://kupiokno.su/567161416996v3at.pdfIn PDF document text
    • http://watertea.space/finding_static_friction_coefficient_lab_reportvlh2l.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491173/normal_604c97f528168.pdfIn PDF document text
    • http://kolizeji.22web.org/basic_core_exercises_for_beginners.pdfIn PDF document text
    • http://tipijijajofupi.sportsontheweb.net/paleolithic_art.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381289/normal_5fda3d0414b16.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379498/normal_5fd9d9d091589.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381546/normal_600168c83b2d0.pdfIn PDF document text
    • http://netlysy.online/sutogorobefexuj0z63i.pdfIn PDF document text
    • http://sujolisake.medianewsonline.com/fepime.pdfIn PDF document text
    • http://physcoo.com/45444248165rc5d4.pdfIn PDF document text
    • http://disclosures.space/gasafamanuwogefkwbc6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424010/normal_5fe4d880abe54.pdfIn PDF document text
    • http://bu-markett.com/699660514007ng57.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://baxomotob.rf.gd/bulave_tujhe_yaar_female_ringtone.pdfIn PDF document text
    • http://kopolug.myartsonline.com/naxelim.pdfIn PDF document text
    • http://jevusavisa.epizy.com/mp_map_hd_image.pdfIn PDF document text
    • http://welalakewap.epizy.com/24_consonant_sounds_in_english_with_examples.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_off0000d84f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD84F 5404 bytes
SHA-256: 1d0df2819d82e519fe908a28ec396cd764c7e27fdc5cc71ac350fe0e12343518
font_01_sfnt_off0000ea82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA82 11520 bytes
SHA-256: a6d9b7ed9940f5192d94b9a83c7d28580e31ec13bcd42dda5e60ade625fb08f6

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