Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b2c8c97f6c6344e…

MALICIOUS

PDF

76.0 KB Created: 2021-03-09 05:05:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 1060bfef1fee156c49a071d9a7aad0e6 SHA-1: 2821f308cb497ff799e2844a6391a39af51da6cc SHA-256: 5b2c8c97f6c6344e81cde88ec5bff3706a584cd367cfc8f60c0d68ae1de22885
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous external URIs, many pointing to disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The document body, though heavily obfuscated, contains metadata related to 'admission system project report', likely a lure to entice users to click on the embedded malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://gimoguvi.ru/123?utm_term=admission+system+project+report PDF link annotation
    • http://jexekiraj.sportsontheweb.net/73673004136.pdfIn PDF document text
    • http://gazajujana.mygamesonline.org/dekolizilotusoxexelej.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423714/normal_6032b846e0925.pdfIn PDF document text
    • http://lezeninimi.medianewsonline.com/exerpeutic_gold_heavy_duty_foldable_exercise_bike_with_400_lbs_weight.pdfIn PDF document text
    • http://bagerisevi.scienceontheweb.net/gotuderawase.pdfIn PDF document text
    • http://begemotiks.fun/binomial_distribution_problems_and_solutions5olut.pdfIn PDF document text
    • http://pro-gram.pro/bukalote8xc5p.pdfIn PDF document text
    • http://lasns.fun/hollywood_reporter_current_coverva8js.pdfIn PDF document text
    • https://cdn.sqhk.co/pirasemofoge/id9KHhb/xpress_recharge_smile.pdfIn PDF document text
    • http://kutatit.getenjoyment.net/37862128307.pdfIn PDF document text
    • http://biomaniix.website/156451974785ncfb.pdfIn PDF document text
    • https://cdn.sqhk.co/melipetoluf/jhie2ha/reflectly_diary_gratitude_journal_mood_tracker_app.pdfIn PDF document text
    • http://getliterate.online/vita_di_galileo_brecht_gratisa6mj3.pdfIn PDF document text
    • https://cdn.sqhk.co/geroterunetu/jbpoDXt/91741924370.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403429/normal_601c0462b3b27.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410020/normal_602553524d3e7.pdfIn PDF document text
    • http://cetop.xyz/77116663381fjc71.pdfIn PDF document text
    • http://netlysy.online/ana_britannicar8z07.pdfIn PDF document text
    • http://rent-nout.site/bastien_piano_for_adults_review15ksm.pdfIn PDF document text
    • https://cdn.sqhk.co/xonizarisu/ezfia1b/puropukuzuve.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wulibazosuxib.onlinewebshop.net/does_chick_fil_a_hire_at_14_in_new_york.pdfIn PDF document text
    • http://nitubak.atwebpages.com/moluluzuzaluru.pdfIn PDF document text
    • http://kafotafuvodalix.onlinewebshop.net/talagedopozilugefaku.pdfIn PDF document text
    • http://wonanikapudidak.atwebpages.com/fufegawikusamugazorupovu.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_off0000ecd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECD9 5144 bytes
SHA-256: 407897d2da36efe7c616d8a8e5e590248009589153c5bcec09237e87c64b51de
font_01_sfnt_off0000fe53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE53 10540 bytes
SHA-256: 5f4262ec23e5c4c0060dd5a5487e6e65819653085ee2fb926ad4146a9295dc02

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