Malicious PDF — malware analysis report

Static analysis result for SHA-256 edd00499b6a06e23…

MALICIOUS

PDF

70.7 KB Created: 2021-03-11 12:36:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 008e72078e92266773cf134b37dcda67 SHA-1: 5632c07b78d52b584da5161437deea3f62ded967 SHA-256: edd00499b6a06e2372c6dd564557c2a1166f7b7be5a8f7f631af8fe257b3af8c
166 Risk Score

Malware Insights

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

The sample is a PDF document that contains multiple embedded links, several of which point to suspicious or unknown domains. The heuristic 'PDF_RANDOM_URL_LINK' specifically flags a link to 'http://privateguardingserviceagainstdanger.site/vista_golf_app_cheats26ufl.pdf', indicating a high likelihood of malicious intent. The ML classifier and ClamAV detection further support its classification as malicious, likely a phishing or trojan delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not 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.
  • 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://jacksth.ru/wix?keyword=ohm%2527s+law+worksheet PDF link annotation
    • http://vadosixajobirug.mygamesonline.org/settlers_of_catan_card_sleeve_size.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426816/normal_6001d1757a56c.pdfIn PDF document text
    • http://czecheducation.space/sebixasadyca87.pdfIn PDF document text
    • http://repair-telefonov.ru/free_hoodie_template_vectors9nna.pdfIn PDF document text
    • http://privateguardingserviceagainstdanger.site/vista_golf_app_cheats26ufl.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493600/normal_5fe19f329e65d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459188/normal_6037588f782a5.pdfIn PDF document text
    • http://somixewavado.sportsontheweb.net/sonubaxusa.pdfIn PDF document text
    • http://bomaduworofa.medianewsonline.com/mevekidupe.pdfIn PDF document text
    • http://fujigukatujewu.medianewsonline.com/57733462068.pdfIn PDF document text
    • http://pililiriniru.mypressonline.com/sbi_education_loan_affidavit_format.pdfIn PDF document text
    • http://bovibuvebus.getenjoyment.net/satofiletit.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/7bb39620-aa6f-4fcc-a88f-9b56f1561ea8/how_to_take_apart_a_cabrio_washer.pdfIn PDF document text
    • https://s3.amazonaws.com/zumezeviwakiz/good_antivirus_app_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/lewuli/fodovagubefokivexesimo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/445405e0-1bd6-451a-9a87-74231fe27d25/how_long_does_it_take_your_carpet_to_dry_after_cleaning.pdfIn PDF document text
    • https://s3.amazonaws.com/fajetufekejo/9329072170.pdfIn PDF document text
    • http://kofepiropi.onlinewebshop.net/10_nautical_knots_to_mph.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3fd62d3-b080-42a3-8de9-f9b4ec4cb3eb/bulk_crossword_puzzle_books_for_seniors.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3daf6213-3d60-4e86-8fff-99e1f9dc61fc/90499378053.pdfIn PDF document text
    • http://nukilaba.myartsonline.com/how_do_you_calculate_energy_efficiency_ratio.pdfIn PDF document text
    • http://duwemanuwixam.atwebpages.com/what_is_ethics_of_justice_and_ethics_of_care.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32173f07-e30c-4dff-9263-41337cc81e39/sinners_in_the_hands_of_an_angry_god_audio_prentice_hall.pdfIn PDF document text
    • https://s3.amazonaws.com/zupenafud/android_simple_notification_example_kotlin.pdfIn PDF document text
    • https://s3.amazonaws.com/jebokizez/kasewutegafuxuga.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_off0000d795.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD795 5140 bytes
SHA-256: 63b0f34e7d51da4ed7dd95b763e86b8e7d591a097688d971dad8f41630e93921
font_01_sfnt_off0000e8f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8F6 10564 bytes
SHA-256: 05de07e8efcfe65297a32a756e1bb440d93e805d281ecb19dac179cd6538cdeb

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