Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e844a4162efab1b…

MALICIOUS

PDF

80.0 KB Created: 2021-04-05 21:22:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9b0c8c8588a7d1c2c4a0bc012f403dc0 SHA-1: 6cbef490e2088e6c98e2cb5f56962129bfd59004 SHA-256: 9e844a4162efab1becaedda44bbed42ad98494d93662fae93caf9fb32a955537
96 Risk Score

Malware Insights

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

The sample is a PDF file flagged by ML classifiers and ClamAV as malicious. It contains an embedded URI pointing to a suspicious domain, 'jumiwimov.ru', which is likely part of a phishing or malware distribution scheme. The PDF structure itself appears to be intentionally malformed, with duplicate object bodies, further indicating malicious intent. No scripts were extracted, but the presence of external URLs suggests a download or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jumiwimov.ru/wix?keyword=johnny+crawford+songs+patti+ann
    • https://cdn.sqhk.co/sizozizaj/ijiif51/wadonapew.pdf
    • http://busforpay.online/499303872540sev4.pdf
    • http://jawixogu.mygamesonline.org/ejercicios_92_del_algebra_de_baldor_resueltos.pdf
    • https://cdn.sqhk.co/nomuzali/fjeCpMU/2435695842.pdf
    • http://konalofasu.mywebcommunity.org/what_is_a_rehabilitation_care_facility.pdf
    • http://yarrebitteh.online/buy_slot_machines_near_mewdfa6.pdf
    • http://yewes.fun/53805428346zljhd.pdf
    • https://cdn.sqhk.co/kufomopinu/Shigjwh/best_browser_video_downloader_ios.pdf
    • https://cdn.sqhk.co/tovipovo/NGgijd2/jofogasapozilipawurej.pdf
    • http://swiss-gear.store/army_awards_writing_guide2buj6.pdf
    • https://cdn.sqhk.co/finizaga/ogcjgid/wulobesuf.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/d72dd915-5256-45f6-b5a7-4e828124b134/is_a_yamaha_r6_a_good_first_bike.pdf
    • http://dejexek.epizy.com/74578569111.pdf
    • http://tirigofov.atwebpages.com/10664043528.pdf
    • https://uploads.strikinglycdn.com/files/fc6f4b83-2328-4dd8-951f-7f22e74b856f/65672858820.pdf
    • http://vopapokolozanum.rf.gd/how_much_does_a_hearing_aid_cost_in_malaysia.pdf
    • http://moxinipikilugu.rf.gd/78500060174.pdf
    • https://s3.amazonaws.com/xukirizugukugi/sigotixo.pdf
    • http://lunuganuxik.epizy.com/the_chaser_tv_show_usa.pdf
    • http://wivaxodi.onlinewebshop.net/download_adobe_acrobat_dc_reader_for_android.pdf
    • https://s3.amazonaws.com/xipavir/old_bollywood_movies_song.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec12.bin
d986f712acc5df3c906cae285eb2c5bc58c761ead9475f53f4056b050be83af9
pdf-font-stream PDF embedded font (sfnt) at offset 0xEC12 5240 bytes
font_01_sfnt_off0000fde7.bin
44255da4fa15bfa782e268d474e551360d415af888b01304197da326715f7d37
pdf-font-stream PDF embedded font (sfnt) at offset 0xFDE7 11216 bytes
font_02_sfnt_off00012419.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0x12419 4324 bytes