Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfdaeaf20f3f3d7a…

MALICIOUS

PDF

78.4 KB Created: 2021-05-14 02:03:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 2f7f593e220e0c044c9280330f3b3432 SHA-1: e519744e5ef3a6d36b1afa07666c24322ecb4a0c SHA-256: cfdaeaf20f3f3d7a228353637b1335ece4bf71859c25f1c65cc37c2e51f77201
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous embedded URLs, with a primary one leading to a suspicious domain that appears to be part of a link farm designed to redirect users. The document body, though heavily obfuscated, suggests a lure related to common search queries, likely to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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://mezovuduw.ru/strik?utm_term=my+sewing+machine+won%2527t+stitch+properly PDF link annotation
    • http://ruguwafe.scienceontheweb.net/talakewumelagavugigu.pdfIn PDF document text
    • http://midutabumi.22web.org/13153369211.pdfIn PDF document text
    • http://ravevuzovije.mywebcommunity.org/catechesi_tradendae.pdfIn PDF document text
    • http://kutatit.getenjoyment.net/37862128307.pdfIn PDF document text
    • http://wewofif.scienceontheweb.net/cubs_broadcast_schedule_2020.pdfIn PDF document text
    • http://fudoviwil.mywebcommunity.org/samsung_grand_prime_plus_dual_sim_price_in_south_africa.pdfIn PDF document text
    • http://gezakiribonenin.mywebcommunity.org/20041887887.pdfIn PDF document text
    • http://tufinanegonaj.medianewsonline.com/abrsm_grade_2_theory_past_papers.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://puxedasepuk.epizy.com/adeptus_custodes_codex_vk.pdfIn PDF document text
    • http://mafakizukizunof.epizy.com/socrates_philosopher_in_urdu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/baca7a78-48e6-47c5-9b79-19d6b8403d7d/how_to_get_wind_materia_ff7_remake.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d164f00-5754-4386-8b44-f58d63a39c49/basawemozubiw.pdfIn PDF document text
    • http://lupixopuvir.onlinewebshop.net/ways_to_describe_rain.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7ef43af-d6e9-421d-a707-6e09aaac3300/student_information_form_doc.pdfIn PDF document text
    • http://patuwovoparivi.rf.gd/free_halloween_birthday_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/wanasuvedigo/icing_recipe_for_chocolate_sheet_cake.pdfIn PDF document text
    • https://s3.amazonaws.com/numegubowalonan/71313399941.pdfIn PDF document text
    • http://sijopar.epizy.com/16365956556.pdfIn PDF document text
    • http://surotipetufamam.rf.gd/wendys_french_fries_nutrition_facts.pdfIn PDF document text
    • https://s3.amazonaws.com/bupijila/ganujonedixakarukop.pdfIn PDF document text
    • https://s3.amazonaws.com/fizup/21547896078.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39fcbf9e-213c-41e9-b02a-fc6231401513/how_do_i_change_the_igniter_battery_on_a_weber_spirit_grill.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_off0000f39a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF39A 5580 bytes
SHA-256: f74e09886c4a6993eccc66d7dbd9fc5c96c927587e4a43af73e4ab240c1aae79
font_01_sfnt_off0001069a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1069A 10440 bytes
SHA-256: 2673aec5e25541892252c22bfa89e09b127f6c21eb7e36934f69e020846eaba5

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