Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1414013b840d9d5…

MALICIOUS

PDF

78.4 KB Created: 2021-04-01 01:12:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: a8adc3eb1d45a412a6bdaf70c1f78042 SHA-1: 0eeb9a738d64cb60af6431dbe329cd816030634a SHA-256: d1414013b840d9d5badb0669b08ceb6604f16b7e8646dd1ca84dd2f6ca166095
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, flagging it as a phishing trojan. It contains numerous external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The document body, though heavily obfuscated, appears to be a lure related to "Cancer de cuello uterino pdf 2020 bolivia", aiming to drive traffic to malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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.
  • 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://midufefew.ru/award?keyword=cancer+de+cuello+uterino+pdf+2020+bolivia PDF link annotation
    • https://cdn.sqhk.co/xikesurufa/higgidr/60451399270.pdfIn PDF document text
    • https://cdn.sqhk.co/kagaxavog/hgfgggh/game_online_pc_sakura_school_simulator.pdfIn PDF document text
    • https://cdn.sqhk.co/busanurutar/5WQUhhX/sufezobolo.pdfIn PDF document text
    • https://bamewubi.weebly.com/uploads/1/3/2/3/132303354/wejiwejirego-zalitoguxubabuf-mavaduretuse-mibupudewa.pdfIn PDF document text
    • https://jalusuduzewot.weebly.com/uploads/1/3/1/4/131456012/wulijeba_wofovotubovo_bebapumituz.pdfIn PDF document text
    • https://pafetuvuwube.weebly.com/uploads/1/3/4/3/134321561/kexopadudizuju_gatokiw_pumesak_pefefujigezep.pdfIn PDF document text
    • https://lowinegegin.weebly.com/uploads/1/3/1/1/131164077/27565bf7631.pdfIn PDF document text
    • https://cdn.sqhk.co/lujobitazeku/5gfAjdY/22220146621.pdfIn PDF document text
    • https://guvusogom.weebly.com/uploads/1/3/5/3/135324715/fipufego_pakokefalivut_sitipuja.pdfIn PDF document text
    • https://zowadadevifu.weebly.com/uploads/1/3/4/5/134597758/tonivite-rolilitif.pdfIn PDF document text
    • http://nekuwagibajese.getenjoyment.net/cuantos_metros_cuadrados_equivale_un_milimetro_cuadrado.pdfIn PDF document text
    • https://lixobezabutefa.weebly.com/uploads/1/3/1/4/131406736/320c5048.pdfIn PDF document text
    • http://wofurasosezisax.mywebcommunity.org/critical_race_theory_book.pdfIn PDF document text
    • https://pegepigav.weebly.com/uploads/1/3/4/4/134481067/1100785.pdfIn PDF document text
    • https://cdn.sqhk.co/notizejamebo/fhhNhaq/lovecraft_country_recap_episode_10.pdfIn PDF document text
    • https://cdn.sqhk.co/ripalufix/ihbgghu/red_button_buzzer.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/tibanepoxilibud/how_to_be_an_excellent_operations_manager.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxenipup/zofalona.pdfIn PDF document text
    • http://mewabetowa.myartsonline.com/fimorexum.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_off0000ef3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF3F 5352 bytes
SHA-256: ea7ee54a24c5409f075711c5bd939bd24cfebde6cfe0f89d295de908c2b6dba9
font_01_sfnt_off0001017c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1017C 12788 bytes
SHA-256: 7bfe73d01714833d8bc66ffb5a03fbfb0168799e81eda933380f81cedb1c32f4

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