Malicious PDF — malware analysis report

Static analysis result for SHA-256 e03711e8297996b0…

MALICIOUS

PDF

79.9 KB Created: 2021-04-07 23:40:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: fd3bb157a9a4d8129e9bbfc0d0ab55bf SHA-1: c9d3cc557ecc3df627fccc4fbbc6071395216c58 SHA-256: e03711e8297996b0db477623c55a9d86a7532cd895d2e03368f8117cf6cec464
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. Some of these links point to potentially malicious content, as indicated by the 'unknown' reputation.

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://ponafet.ru/123?utm_term=borderlands+the+pre+sequel+trophies+guide PDF link annotation
    • http://kofojoxake.mygamesonline.org/horton_hears_a_who_full_movie_in_hindi_dubbed_download.pdfIn PDF document text
    • http://levitajagukog.scienceontheweb.net/hydraulic_sheet_bending_machine_mini_project.pdfIn PDF document text
    • http://gadivawiw.sportsontheweb.net/british_council_reading_book.pdfIn PDF document text
    • http://nesebonuvobeju.getenjoyment.net/26075181270.pdfIn PDF document text
    • https://cdn.sqhk.co/malevevipali/ciaVuhd/como_actualizar_java_en_android.pdfIn PDF document text
    • http://xawamiwupajev.mygamesonline.org/48171634727.pdfIn PDF document text
    • https://cdn.sqhk.co/galemojubemo/hKmggjg/toss_em_all_apk_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://f621ecf8-e26c-4db3-9bdf-176eeceb312d.filesusr.com/ugd/b3755e_f84ed424a99f402cad05ccb88984c7d3.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebe3bb7a-31c1-49a2-8da3-b7b2a16e0004/nowevakikeji.pdfIn PDF document text
    • http://disoluje.myartsonline.com/3431130935.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c49b399-dc16-4174-befb-63d3c5f616f6/48204404349.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a26e4492-6da3-45dd-a0cf-1cd69f50352b/lidawuzoxadirobewab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95a4d87c-8e19-471c-82c4-7a2d313e4f03/bumomuxakelekutetudadusi.pdfIn PDF document text
    • http://bufijonewufo.onlinewebshop.net/online_to_word_converter_farsi_support.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a4c9521-f049-4ad5-becd-f7afadd66449/tifuxutakafisenuzuwafag.pdfIn PDF document text
    • http://vunonam.atwebpages.com/stumbelbloc_mix_ratio.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d8d5afe-42c1-47ea-b68b-47df66c94699/karcher_high_pressure_cleaner_user_manual.pdfIn PDF document text
    • https://b3709dad-42f4-4621-9b7e-74d31ca978cd.filesusr.com/ugd/f91cf1_448c8608384142359f8de18b61320ace.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0351d586-8a97-4a1f-8b8a-31054031d91c/viking_sewing_embroidery_machine_reviews.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_off0000f5dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5DC 5396 bytes
SHA-256: 68a2e151ac45a241521e79b613d9ea6a9fd22c7b3df27eb780ac1c1592191aa2
font_01_sfnt_off00010825.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10825 13268 bytes
SHA-256: b5ffb5a2c04d7fbddbadc4f58141f4a35fe0cdc8eb016c059823d640e7e60fe7