Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b0a9c10f12b3bb0…

MALICIOUS

PDF

69.6 KB Created: 2021-03-22 12:41:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: cffd4cfbe55207c16d831534297a3198 SHA-1: d003efc1a692ee04a34a66a74f982a15d81ac63c SHA-256: 7b0a9c10f12b3bb078b1467d48269ff86e688f2bdd197f6a7dd7501ad2acd9e1
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF file contains numerous embedded links, many of which point to disposable domains and redirectors associated with malicious activity. Heuristics indicate these links are part of a link farm designed to lead users to potentially harmful content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://dafemum.ru/123?utm_term=bharat+pe+fps+apk In PDF document text
    • http://greyfruit.space/xbox_360_cant_open_trayek1fz.pdfIn PDF document text
    • http://vadosaj.getenjoyment.net/how_to_unlock_panasonic_air_conditioner_remote_control.pdfIn PDF document text
    • http://itravelgr.com/braun_7865cc_series_7_wet__dry_premium_electric_shaver0taxm.pdfIn PDF document text
    • http://carinsusa.info/54102486115ric82.pdfIn PDF document text
    • http://samelike.site/cellular_respiration_online_lab_answer_keyqmox7.pdfIn PDF document text
    • http://purpless.vip/what_is_the_average_cost_to_install_a_electric_tankless_water_heaterqfts5.pdfIn PDF document text
    • http://gamuxiwami.getenjoyment.net/80234503651.pdfIn PDF document text
    • http://krokoboko3.xyz/397631973941j74t.pdfIn PDF document text
    • http://medgaj.com/hidden_speakeasy_near_me2j9k1.pdfIn PDF document text
    • http://onesmall.space/how_to_write_a_paragraph_grades_3-56rewq.pdfIn PDF document text
    • http://sell-toclick.online/domuxeh0u9r.pdfIn PDF document text
    • http://maska-respirator.com/biology_book_in_bengali_version_class_12dxt91.pdfIn PDF document text
    • http://apsdd54gfv.xyz/business_administration_major_in_financial_management_pup4ay8x.pdfIn PDF document text
    • http://nout-prokat.website/63479948076dsc2e.pdfIn PDF document text
    • http://xidasetetobuge.scienceontheweb.net/learn_french_free.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc5c539f-f9ea-4265-9ae9-1dc3448270f1/rexupekupumibifarim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60a7db77-6b41-435f-8127-3e2ec61dac87/64146729218.pdfIn PDF document text
    • http://karokifewugasuz.onlinewebshop.net/capelania_hospitalar_e_tica_do_cuidado.pdfIn PDF document text
    • https://d4bcd744-2348-4fe3-9006-05b2fcbd3cbd.filesusr.com/ugd/704566_85f35632d5c341f4a6f4129017047db5.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b01d07f5-2b41-4ff9-bd29-6eded46164d8/how_to_write_an_equation_in_standard_form_given_slope_intercept_form.pdfIn PDF document text
    • https://d67926d6-99fe-48a4-938f-95006fdf2de6.filesusr.com/ugd/21d82e_335203eaa07541e88950eeb78858bc74.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ffc3aa1-77bd-4a52-9211-44676df8d4e0/nordic_track_skier_accessories.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_off0000cfcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFCF 5068 bytes
SHA-256: 6dd4e70745f3528049bae8a28ff267f260eb20372f1b874bd9b9c08609fdacb0
font_01_sfnt_off0000e10c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE10C 13108 bytes
SHA-256: d91caa3201a83bb900c76566e374d54ea7ef370c865a3ac17658bfefa2fbdf38