Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2bf213af2722d28…

MALICIOUS

PDF

75.9 KB Created: 2021-03-10 09:58:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: b271eb18bbba0b3e6b59c5627598ba8a SHA-1: b4607cb522160c1ae7fe218507ca1a49a10e2c3d SHA-256: d2bf213af2722d282a7639f0ad92d117e8426bc5cb2ccfa762db0bc8dede3432
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged as malicious by multiple heuristics, including a critical alert for linking to known malicious redirector infrastructure. The document body is heavily obfuscated, but the presence of numerous links to disposable domains suggests a phishing or malware distribution attempt. The ML classifier also provided a very high confidence score for maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/wix?keyword=rab+guide+gloves+2 In PDF document text
    • http://cucoupon.info/kadevijuwesofabemuk10mnf.pdfIn PDF document text
    • http://topsalon.xyz/84350138620x4qqi.pdfIn PDF document text
    • http://apeech.ru/arlo_pro_2_setup_guide2524c.pdfIn PDF document text
    • http://mapugukabazewu.scienceontheweb.net/oraciones_a_san_judas_tadeo_en_casos_dificiles_y_desesperados_novenas.pdfIn PDF document text
    • http://maxist.ru/611631206231o31w.pdfIn PDF document text
    • http://vizojuzoninunoz.scienceontheweb.net/unidad_3_leccion_1_reteaching_and_practice_answer_key_avancemos_1.pdfIn PDF document text
    • http://hookup681.site/ms_excel_basics_exercises_downloadbd1ry.pdfIn PDF document text
    • http://idealica-ordina.site/fried_green_tomatoes_book_author8f5sw.pdfIn PDF document text
    • http://probmaka.tech/2016_chrysler_town_and_country_service_manualkhywh.pdfIn PDF document text
    • http://pesuloduf.medianewsonline.com/dell_latitude_e6540_i7_4th_generation_review.pdfIn PDF document text
    • http://powajaxib.medianewsonline.com/titawomutubav.pdfIn PDF document text
    • http://copyrighthelpptteam.com/what_motor_is_in_a_2006_bmw_330xizi12l.pdfIn PDF document text
    • http://sesizuxewewax.mygamesonline.org/cuando_te_duele_el_pezon_que_significa.pdfIn PDF document text
    • http://pobadabodoz.scienceontheweb.net/how_to_get_bad_smell_out_of_dyson_vacuum.pdfIn PDF document text
    • http://nikecortez.net/22597616529mrkt1.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/a29da7af-f1ec-4114-8675-bcc47361c6d1/tanunowobowa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae6e0cfd-4d4b-4b9d-ac69-e892f37b163c/apc_smart_ups_2200_service_manual.pdfIn PDF document text
    • http://tapoloferazuziw.atwebpages.com/cambridge_additional_mathematics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8837686-bf57-4dde-8451-b4437032ef5f/18175947886.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_off0000ee2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE2C 5236 bytes
SHA-256: d9bd22d91ed679d26f813d8b4b00a98cc7eac9ef99f123ceed072336ce810066
font_01_sfnt_off0001001b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1001B 10080 bytes
SHA-256: aacd8a249c52af05768abe9d36baf2f4a1a65d3ad597988fdac8644de3ed127e

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