Malicious PDF — malware analysis report

Static analysis result for SHA-256 397c8bf171bcc901…

MALICIOUS

PDF

77.8 KB Created: 2021-04-01 19:10:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 5b042ce63626aebc25612b0467388877 SHA-1: 175696769cbfbd4ef4b40509a84e1d28894e54dd SHA-256: 397c8bf171bcc901d396737333bfafddd681679056a1084d9bc7ae44f4837023
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dafemum.ru/aws?utm_term=armitron+wr165+ft+set+time PDF link annotation
    • http://rojepaj.iblogger.org/93514314524.pdfIn PDF document text
    • http://zaxegod.getenjoyment.net/34837964568.pdfIn PDF document text
    • https://cdn.sqhk.co/rarinuva/gjQjcmR/lg_health_app_review.pdfIn PDF document text
    • http://gipovasota.sportsontheweb.net/levikiredevutavu.pdfIn PDF document text
    • http://dikiwezuvejeve.iblogger.org/maastricht_guidelines_h_pylori_2016.pdfIn PDF document text
    • https://cdn.sqhk.co/sekigozujeme/Ehenn3E/world_war_rising_hannibal.pdfIn PDF document text
    • https://cdn.sqhk.co/retugatodof/jhfjcov/xefelizemexeke.pdfIn PDF document text
    • https://cdn.sqhk.co/remonupode/Y9OUihZ/4986830226.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f6a2d1b-85ef-4372-b9cb-e7356b339f35/fire_and_blood_book_plot_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95b78429-9ba8-4088-bcb6-a61025de48fd/excel_vba_get_column_letter_from_header.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a5f1c43-437c-4c30-8ff3-1b441603f8e3/homelite_leaf_blower_hard_to_start.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9669ee88-9108-4e84-925f-94773c0a891e/sekamevuv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09641df1-9b31-45cf-84b1-a9f12082f076/75060832910.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28a8fa74-444e-47ef-ad81-fbdc94df2081/return_to_dark_tower_shipping_date.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9eb4e1e-78a5-4d65-bc99-c874864f2659/requirements_to_become_a_chick_fil_a_operator.pdfIn PDF document text
    • http://rufapapufogap.onlinewebshop.net/24332957380.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5cc7f92d-b1f1-4542-b23f-06f67371508d/teorema_fundamental_del_calculo_integral_definida_ejercicios_resueltos.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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e28d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE28D 5084 bytes
SHA-256: f91f5243627215738f8b5540d2ec5a56f853cdf20078bce8761743119fed7ba5
font_01_sfnt_off0000f3dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3DC 6664 bytes
SHA-256: 36a5d8372ff6da78bbf9a5601b2053d79c23655174a72aee3b51a7c4f27d7ae9
font_02_sfnt_off00010564.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10564 10668 bytes
SHA-256: b9bf87eb8d4c4f90bbc0bd9b4b0e45ed52468b598fe649637d50a183893f9baa

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