Malicious PDF — malware analysis report

Static analysis result for SHA-256 c98ed74e3b2f7ad4…

MALICIOUS

PDF

75.2 KB Created: 2021-03-24 00:05:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c7acadaac8d93134a778261993f46951 SHA-1: 27cfa4a01869044569456e7b64fff9da8d97e585 SHA-256: c98ed74e3b2f7ad48c5fe82a1b78d5198070cde5a99bc91071002c49c298d196
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, identified by both heuristics and a machine learning classifier as malicious. ClamAV also detected it as a phishing trojan. While no scripts were extracted, the presence of the malicious URL suggests an attempt to redirect the user to a site for phishing or malware delivery, likely initiated via a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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=stuffed+peppers+nutritional+information
    • http://mivegik.mygamesonline.org/promissory_note_in_telugu_words.pdf
    • http://kyhni.site/91386946509qi0w7.pdf
    • https://cdn-cms.f-static.net/uploads/4377679/normal_604cc11ec8837.pdf
    • https://cdn-cms.f-static.net/uploads/4420756/normal_6044f7f1ecdeb.pdf
    • http://wisecredit.info/happy_wheels_free_full_gamed8ji5.pdf
    • https://cdn.sqhk.co/jipuxoxukul/jg8Fgj7/crystal_reports_training_toronto.pdf
    • https://cdn.sqhk.co/jasorevujoxu/9fjiarj/button_button_short_story_questions_answers.pdf
    • http://eferevole.com/waxaxoso7qu56.pdf
    • https://cdn.sqhk.co/dukizukijire/iihgbig/samsung_smart_tv_games_app.pdf
    • http://effektzhizni.ru/exerccios_8_ano_pas_nao_terrgzzdd.pdf
    • https://cdn.sqhk.co/lulaxujik/gPkmLgi/daily_workouts_free_home_fitness_workout_trainer.pdf
    • http://gallery-shop.site/52983170660trc1j.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/7ab32334-181d-4eca-bb2f-1b838371a19b/96720970080.pdf
    • http://kubowulurarekij.myartsonline.com/rising_of_the_shield_hero_where_does_the_anime_end.pdf
    • http://xukokumo.myartsonline.com/fuzirixuniretumekuwametuf.pdf
    • http://lowelomavojezi.myartsonline.com/ethiopian_value_added_tax_proclamation.pdf
    • https://uploads.strikinglycdn.com/files/e76a758a-aff6-417e-965a-ebf63eb5487f/conair_circular_hair_trimmer_review.pdf
    • http://pikaderobiw.atwebpages.com/tefipufuwuwote.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6ad.bin
3666d3e7516e2fb0b22cade2785026926052778b192f6025b1d35ef51f812210
pdf-font-stream PDF embedded font (sfnt) at offset 0xE6AD 5292 bytes
font_01_sfnt_off0000f897.bin
d6fe838a701cf5256adf45f911f9a4ab7fc39f825697ffa92afca58ba43f0313
pdf-font-stream PDF embedded font (sfnt) at offset 0xF897 11784 bytes