Malicious PDF — malware analysis report

Static analysis result for SHA-256 beb2c697c8c845fc…

MALICIOUS

PDF

70.5 KB Created: 2021-03-29 03:28:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: b82865682ca9c93fa530f1e9c893a77e SHA-1: a5a567bb964faf882dde31e3643cef89a395e9cc SHA-256: beb2c697c8c845fc0b91cdfcd93413f2a912df5127de761639e1dad77c921023
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains a significant number of external links, identified as a link farm, with the primary URL pointing to a suspicious domain. This suggests an attempt to distribute malicious content or redirect users to phishing sites under the guise of providing educational resources. The ClamAV detection and ML classifier further support its malicious nature, indicating it's likely a phishing or trojan delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://xezojetit.ru/strik?utm_term=ethiopian+grade+9+mathematics+textbook+pdf+download PDF link annotation
    • https://cdn.sqhk.co/guzikiku/hheaBih/70830012582.pdfIn PDF document text
    • https://cdn.sqhk.co/junikesiza/hdiiCvC/video_er_pro_extension_google_chrome.pdfIn PDF document text
    • https://bopelesi.weebly.com/uploads/1/3/0/8/130874615/8f4509dcd4dc.pdfIn PDF document text
    • http://gitilapen.66ghz.com/digital_ammeter_circuit_diagram.pdfIn PDF document text
    • https://vokugovu.weebly.com/uploads/1/3/4/5/134598923/2700016.pdfIn PDF document text
    • https://sevenunoxesu.weebly.com/uploads/1/3/4/3/134341304/xekumuxobu-xepogijaridi-motitaveja-mapexopi.pdfIn PDF document text
    • https://mesakarune.weebly.com/uploads/1/3/1/3/131380767/2414578.pdfIn PDF document text
    • https://salovunuwav.weebly.com/uploads/1/3/0/9/130969923/nilitobod-mupulo-didalufizo.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/sisaxu/makipogarekaxejiwo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad27a612-0eee-4b40-8126-8b0ea7dba5a2/charter_spectrum_remote_codes_for_onn_tv.pdfIn PDF document text
    • https://s3.amazonaws.com/ronatiduzoxij/32955641166.pdfIn PDF document text
    • https://s3.amazonaws.com/tisegovofu/how_much_is_digital_subscription_to_wsj.pdfIn PDF document text
    • https://s3.amazonaws.com/rizoli/why_does_my_hp_printer_turn_off_by_itself.pdfIn PDF document text
    • https://s3.amazonaws.com/wuvepilamamuse/magnetic_balls_game_apk.pdfIn PDF document text
    • http://libogesozi.rf.gd/foxit_reader_current_printing_driver_is_not_available.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e699b37-183e-4976-a8dd-ead8e6b681b7/75595040742.pdfIn PDF document text
    • https://s3.amazonaws.com/jawusawar/54435059515.pdfIn PDF document text
    • http://jakomop.rf.gd/zegupo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7dc1368e-b440-4954-ace1-d90c3bdb54f7/86675109602.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90958a9b-a1fc-49c1-baa1-a7a9ac33d670/jusag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/379ef9be-b120-49a4-b9ca-6f1ec5bd5d36/lasubedajawi.pdfIn PDF document text
    • https://s3.amazonaws.com/nafamaragisek/how_much_do_you_make_in_supply_chain_management.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d451.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD451 6048 bytes
SHA-256: 15425ea0a52726e37105668ed83466c7aea57118e6a43d68adc1feb45fca8f2c
font_01_sfnt_off0000e8d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8D5 10224 bytes
SHA-256: 23559e82bd8eb1d8972d189c782300048c2031c8b59e0b3fbf861e8e41c2c5c7

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