Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdb43eca459fed95…

MALICIOUS

PDF

94.2 KB Created: 2021-03-16 00:55:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 37161cc2f451b1768417ef552c25cc23 SHA-1: 26ebedcfb00da8fbedea0d50cfff7b9648381dd5 SHA-256: cdb43eca459fed95ae7f1724969dd08bc651cdf04df9a63c97cc7cbb9fd1b9aa
116 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The 'SE_CALLBACK_LURE' heuristic specifically points to a callback phishing or tech-support scam pattern, where the document likely prompts the user to call a phone number. While no scripts were explicitly extracted, the presence of external URIs and the overall detection profile suggest the document is designed to lead users to malicious content or initiate fraudulent phone calls.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://leonvi.ru/wix?keyword=infinite+campus+pickerington
    • http://drilltech.info/guided_hiking_tours_israellhfwh.pdf
    • http://blubadgehelp.net/charter_remote_control_codes_viziog1xje.pdf
    • http://zofugam.iblogger.org/27900431315.pdf
    • https://cdn.sqhk.co/vufebevefo/bEB6Mgo/gimp_image_to_coloring_book.pdf
    • http://andyhong.blog/bbc_news_reporters_ukhvwz6.pdf
    • https://cdn.sqhk.co/duxadikoti/gdhdEha/ocean_splash_match_3_free_puzzle_games_online.pdf
    • https://cdn-cms.f-static.net/uploads/4407983/normal_5fd7a7150c795.pdf
    • http://pl50off.info/8646543329864k87.pdf
    • http://filanion.online/8106551639842vgu.pdf
    • https://melubezu.weebly.com/uploads/1/3/4/3/134311229/katewodukuvinibus.pdf
    • https://bolefusugo.weebly.com/uploads/1/3/4/8/134868203/xonogami.pdf
    • https://cdn.sqhk.co/kelufuro/Tx9Uuic/do_they_like_me_back_quiz.pdf
    • https://cdn.sqhk.co/jogeguzotire/YYid8ia/snap_assistance_florida.pdf
    • http://fb-ig-copyright.com/lethal_race_hacked_gameogkwr.pdf
    • http://semengergel.ru/mugupamitokgymw1.pdf
    • http://moitender.org/warhammer_fantasy_roleplay_4th_edition_character_sheetp1h88.pdf
    • https://static.s123-cdn-static.com/uploads/4416660/normal_5fe5eeec5082d.pdf
    • https://static.s123-cdn-static.com/uploads/4412387/normal_5ff16c11657bd.pdf
    • http://vknart.xyz/0.13.1_minecraft_pep5lym.pdf
    • http://italiabeach.space/kodiratiliwiwomatafcp4y.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://bogizun.epizy.com/cctv_dvr_software_for_pc_free.pdf
    • http://rotamamum.epizy.com/how_much_does_a_jeep_cherokee_service_cost.pdf
    • http://veraliw.rf.gd/xabazerikitametimivur.pdf
    • http://jejuton.rf.gd/92014507649.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_off0001319d.bin
9add5631e92f10300be00c79459886317f8a3f8325400afe41f237374e9f7f69		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1319D 5304 bytes
font_01_sfnt_off0001439d.bin
29e97caeaf40fb7dba12c303140c521e0183afeea8764043a507b8181ebd6b66		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1439D 11836 bytes

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