Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbc39e135c4c4ff0…

MALICIOUS

PDF

75.3 KB Created: 2021-03-09 12:46:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bc54b958f8d15d350f1f850c755550d2 SHA-1: 96506adf24007abbd8d4c98079c4331545bfbd5b SHA-256: bbc39e135c4c4ff021e0f4d93c73588335bf717d0e3eafc338f35807aa83620a
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics, including a critical ClamAV detection and an ML classifier. It contains embedded URLs, one of which is `https://soxebez.ru/wix?keyword=kik+messenger+7.0.1.76+apk`, suggesting a phishing or malware distribution attempt. The PDF also contains a large number of external links, indicating a potential link farm for SEO manipulation or further distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://soxebez.ru/wix?keyword=kik+messenger+7.0.1.76+apk
    • https://cdn.sqhk.co/mikedeto/jbOhcWl/fuxixotirusovewojo.pdf
    • https://cdn.sqhk.co/mixaluwekitu/OM9hajh/dragon_ball_z_game_online_for_mobile.pdf
    • https://cdn.sqhk.co/nusideja/f5Bhcpf/heart_3d_model.pdf
    • https://cdn-cms.f-static.net/uploads/4489988/normal_5fe763804c9a1.pdf
    • https://cdn.sqhk.co/letaziseb/hhdjbjc/break_time_over_gifts.pdf
    • https://cdn.sqhk.co/jebumujo/ghfh8ia/3579965961.pdf
    • https://cdn.sqhk.co/zenekukera/Qgjnzig/my_airtel_digital_tv_not_working_after_recharge.pdf
    • https://cdn.sqhk.co/vixukose/bde2jeJ/molojipedimasefujiwetilab.pdf
    • https://cdn-cms.f-static.net/uploads/4391920/normal_601330b9df17d.pdf
    • https://cdn-cms.f-static.net/uploads/4365659/normal_5fdbfa5d286de.pdf
    • https://cdn-cms.f-static.net/uploads/4443815/normal_601849a7db090.pdf
    • https://cdn.sqhk.co/bigokukanuf/ghVjinz/carry_on_jatta_2_full_movies.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/gidibesuxi/pokmon_ultra_sun_and_ultra_moon_-_complete_pokdex_all_qr_codes__shinies.pdf
    • https://s3.amazonaws.com/lezopobigeza/how_to_be_offline_on_whatsapp_android.pdf
    • https://4a39c6c9-989b-4d11-b2d8-cc0becc7f193.filesusr.com/ugd/ef0078_f46904570cf84d4e91a5074f6c8ec390.pdf?index=true
    • https://s3.amazonaws.com/kuboki/venufuzewonidoriwatok.pdf
    • https://s3.amazonaws.com/fifuto/how_to_become_a_coaching_psychologist.pdf
    • https://4095172d-bd2f-4181-91d7-dd424e653400.filesusr.com/ugd/df73ab_8a0a16519d444da0946f56d8f00ee0b9.pdf?index=true
    • https://af30af13-e0b7-4de0-aca7-7783c01eade2.filesusr.com/ugd/9757e7_dee49cc68d464b87bc6f8461b71abec6.pdf?index=true
    • https://s3.amazonaws.com/sobaketemu/chargriller_pellet_grill_manual.pdf
    • https://s3.amazonaws.com/tigovatolis/little_drummer_boy_sheet_music_in_c.pdf
    • https://s3.amazonaws.com/pulavokaxe/cisco_webex_for_windows_8.pdf
    • https://s3.amazonaws.com/sezebepit/information_security_policy_free_template.pdf
    • https://30c0d994-bee2-4d79-bc91-d4aaa7251653.filesusr.com/ugd/0962d9_e9c845a5255a47eb800113b697a1ad2f.pdf?index=true
    • 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_off0000e927.bin
0a8be93ce2112d8ebff77d540d87410767191def89ac59d6c3ea932808d27c04
pdf-font-stream PDF embedded font (sfnt) at offset 0xE927 5600 bytes
font_01_sfnt_off0000fc33.bin
cc2ff53da953bf4f9484f9b7b8ff42f1df7e3ce25bb404d793f78c2dba387657
pdf-font-stream PDF embedded font (sfnt) at offset 0xFC33 10516 bytes