Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4bed6305c3826db…

MALICIOUS

PDF

128.4 KB Created: 2021-05-12 14:51:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 844f49f70ca8351dc09c9998f6571425 SHA-1: 219727d1039000215f8e811250a156d7741d7af9 SHA-256: b4bed6305c3826db91c01e0a0dcd932a9ec7518be3a004cf09bb7078ceaab410
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to potentially malicious domains, indicating a link farm or redirection scheme. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external links suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9867

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 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.
  • 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://jacksth.ru/strik?utm_term=general+physics+questions+and+answers+pdf+in+hindi PDF link annotation
    • https://lowobuganigazo.weebly.com/uploads/1/3/1/1/131163610/446e120.pdfIn PDF document text
    • http://leree4.club/bootstrap_responsive_login_page_templatelrwnr.pdfIn PDF document text
    • http://netlysy.online/gomosukeg17xb0.pdfIn PDF document text
    • http://fogejebimo.scienceontheweb.net/41522054916.pdfIn PDF document text
    • http://faxixovojaja.sportsontheweb.net/46046525969.pdfIn PDF document text
    • http://neojust.ru/kenmore_111_washer_lid_switch_replacementq6d5c.pdfIn PDF document text
    • https://fosevikotik.weebly.com/uploads/1/3/1/6/131637163/daxavitafexisatuboku.pdfIn PDF document text
    • http://kieverts.xyz/p520_nikon_weightqkd43.pdfIn PDF document text
    • http://boothattendant.com/vue_framework_7_templatesqf8m.pdfIn PDF document text
    • http://fufirewavit.getenjoyment.net/metode_apus_darah.pdfIn PDF document text
    • http://idealslimitalia-official.site/673747758621mmbt.pdfIn PDF document text
    • http://nosatines.mypressonline.com/54903122092.pdfIn PDF document text
    • https://tunozuranoba.weebly.com/uploads/1/3/5/3/135316660/cb10fd34e.pdfIn PDF document text
    • http://duvejiwuxikon.getenjoyment.net/cara_bookmark_online.pdfIn PDF document text
    • http://usblighter24.site/orcad_17._2_lite_free171xr.pdfIn PDF document text
    • http://loveantravel.xyz/murachs_java_servlets_and_jsp_3rd_editionnci4z.pdfIn PDF document text
    • http://maturibcgj.space/how_to_give_medication_through_a_peg_tubekam9b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://s3.amazonaws.com/rakabexozu/yeh_bansuri_wale_ki_ringtone.pdfIn PDF document text
    • https://s3.amazonaws.com/wizitifowubux/xirumuvamekesixagazefe.pdfIn PDF document text
    • https://s3.amazonaws.com/zarelusipofox/jusurajebenijutazoxoxan.pdfIn PDF document text
    • https://s3.amazonaws.com/rumezo/myanmar_unicode_font_changer_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/sulasatevirexo/ccleaner_apk_android_2._2.pdfIn PDF document text
    • https://s3.amazonaws.com/fajeloninesitel/35613299640.pdfIn PDF document text
    • https://s3.amazonaws.com/jujadodedaruxix/african_gray_parrot_care_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/bubeto/greek_god_family_tree_chaos.pdfIn PDF document text
    • https://s3.amazonaws.com/tafogusegabomu/basketball_game_fight_high_school.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016832.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16832 5476 bytes
SHA-256: da6db08bfcf8c66cfde2c5dd589e17776f1122450df866d66b32809cd8fba36d
font_01_sfnt_off00017ad4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17AD4 3720 bytes
SHA-256: 40ef96da86b6123d577d475be460de15c41b9ca7393a8e650be4e9942aa3c64b
font_02_sfnt_off00018636.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18636 10124 bytes
SHA-256: 4cc7d680ecd08e3fd61c6be1b0340cbf1c69b108ec7cdb7b26b66b476a25accc
font_03_sfnt_off0001a851.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A851 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
font_04_sfnt_off0001b651.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B651 21584 bytes
SHA-256: 32001274cb768cbcff6a2d1537ca21e88e32803fad4349bf32fd2d55e6906c18