Malicious PDF — malware analysis report

Static analysis result for SHA-256 af4b23d7cec8f38c…

MALICIOUS

PDF

83.2 KB Created: 2021-02-27 16:13:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 3d3693680a952e9a25ad582af6b9a613 SHA-1: 2266146aa721234a81de4f21c876851a15badd81 SHA-256: af4b23d7cec8f38c1aa89332e6f58e5073cb18787341058e4d85447c6baff70b
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 domains associated with link farms or potentially malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and numerous external links suggest an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://fokemale.ru/123?utm_term=uniden+dect+6.0+d1660+user+manual+pdf PDF link annotation
    • https://cdn.sqhk.co/vujixete/q2bWjaR/zovagoborigivogej.pdfIn PDF document text
    • https://cdn.sqhk.co/fomavulobet/ddghlhj/types_of_nail_drill_bits_and_uses.pdfIn PDF document text
    • https://ranalugepileli.weebly.com/uploads/1/3/4/7/134735155/2dfd8186.pdfIn PDF document text
    • https://derigibi.weebly.com/uploads/1/3/4/4/134447264/zokusup.pdfIn PDF document text
    • http://jepewadagamer.scienceontheweb.net/8592943406.pdfIn PDF document text
    • https://nukusuruv.weebly.com/uploads/1/3/1/8/131857442/bcf8788.pdfIn PDF document text
    • http://zememor.sportsontheweb.net/super_contra_7_nes_game_genie_codes.pdfIn PDF document text
    • http://dosubodanes.mypressonline.com/duraflame_infrared_stove_heater_with_remote_control.pdfIn PDF document text
    • http://mavigawika.scienceontheweb.net/marketing_plan_executive_summary_ppt.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tuxenipup/nazatopuxupunemebelo.pdfIn PDF document text
    • http://simavanexija.rf.gd/how_to_become_an_information_technology_manager.pdfIn PDF document text
    • https://s3.amazonaws.com/dudujopixejikug/xunusuwaruvinomariti.pdfIn PDF document text
    • https://s3.amazonaws.com/migivewuwe/old_mappila_songs_free_123musiq.pdfIn PDF document text
    • http://fapugiv.rf.gd/communication_plan_template_excel.pdfIn PDF document text
    • https://s3.amazonaws.com/mukut/votekodimexejejitinak.pdfIn PDF document text
    • http://wadatenut.rf.gd/49566186532.pdfIn PDF document text
    • https://s3.amazonaws.com/zedudo/unisa_online_application_form.pdfIn PDF document text
    • https://s3.amazonaws.com/jarawaxanivu/diretikejenen.pdfIn PDF document text
    • https://s3.amazonaws.com/tikofaketonub/bukubalojuwinugorebal.pdfIn PDF document text
    • http://towupew.epizy.com/kagewifajaxafu.pdfIn PDF document text
    • https://s3.amazonaws.com/pigolo/badlapur_movie_songs_musicbadshah.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE28 5672 bytes
SHA-256: cc7cbb2de39a42a24455d5adf2026a9821613215a3b1edd5d66458a2787b42e1
font_01_sfnt_off00010168.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10168 11612 bytes
SHA-256: b1a92775b9add359c840acd72fddc7cf9bc882f1979bb52048272c513c8da5ec
font_02_sfnt_off00012892.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12892 16060 bytes
SHA-256: 2cca29575edef7a9880cf400a7847cc5df22ba1ee7edc19c7b9bafe603f6c979

Open this report in the interactive analyzer, or submit your own file for analysis.