Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cf148e6a6eb0d9f…

MALICIOUS

PDF

78.7 KB Created: 2021-05-07 02:44:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: da5db392f6e3c767b66ab7db8950b4b0 SHA-1: 5bc5bf6d6eeb81591a73503c08cda8ea96f4b47e SHA-256: 1cf148e6a6eb0d9f5ed300c6945f5543ea486d8eb3c12ff0f9a64dd1f37668a4
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable hosting or link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The presence of external URIs and the overall structure point towards a spearphishing attachment, likely designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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://ponafet.ru/strik?utm_term=lasko+digital+tower+heater+reviews PDF link annotation
    • https://cdn.sqhk.co/bepeguvovori/OdQjgjb/3_day_notice_to_vacate_california_template.pdfIn PDF document text
    • https://cdn.sqhk.co/wudawagirus/B4GM4jb/free_color_by_number_cars.pdfIn PDF document text
    • https://fegajasun.weebly.com/uploads/1/3/4/5/134502742/2266718.pdfIn PDF document text
    • http://vuxilenusip.mypressonline.com/zufugunigizetitubufilax.pdfIn PDF document text
    • http://novubelugalij.medianewsonline.com/bed_making_procedure_in_hospital.pdfIn PDF document text
    • http://devubowoku.mypressonline.com/used_craftsman_5600_watt_generator_for_sale.pdfIn PDF document text
    • http://gixuloponij.mygamesonline.org/nelezu.pdfIn PDF document text
    • https://topiropepejepok.weebly.com/uploads/1/3/4/5/134593977/buxatelomixe-roliji-nusuv.pdfIn PDF document text
    • https://cdn.sqhk.co/ximirujusuxo/hchbEic/rikemed.pdfIn PDF document text
    • https://lidowape.weebly.com/uploads/1/3/4/4/134403474/tedelepekekam-zinoxofaseduse.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/mamibis/gupuzasexodejo.pdfIn PDF document text
    • http://livukizaxavubip.rf.gd/nozeran.pdfIn PDF document text
    • http://bilunijo.epizy.com/huawei_p10_lite_android_8_4pda.pdfIn PDF document text
    • http://mibaxeruwo.epizy.com/il_cardellino_libro.pdfIn PDF document text
    • https://s3.amazonaws.com/tanikanaw/zaroropilokowubisizibup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/459f21d8-e65a-4377-b7ac-85330d7d4338/sta-rite_pool_pump_replacement_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a76cb76-da2c-4d40-bcc8-b56ba166c273/what_is_the_yellow_button_on_logitech_k400.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5ba9753-4df6-4c49-9b67-ecde76e2b798/photoshop_7.0_commands_list.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9EF 4924 bytes
SHA-256: c4d20cf4d7add5834ddf54861dd405161cef440a39fcbf45d7baf3bd3c9cd041
font_01_sfnt_off0000fadc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFADC 10988 bytes
SHA-256: c36e8623128c9c77d491ffa662bfb2c0e537af8a1d6a29b2601ee7157c79783d
font_02_sfnt_off00011fc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FC3 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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