Malicious PDF — malware analysis report

Static analysis result for SHA-256 d22a374e395e3632…

MALICIOUS

PDF

85.3 KB Created: 2021-06-04 01:20:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 8cd50148fef175b8dd6ed8f6cb86e7b5 SHA-1: 0a745cdff2c0754f4efe06c31b0d9f87ced20020 SHA-256: d22a374e395e36328a508066ca0016f1e21b120218577a22a24f06b87f7c8b32
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external links, with one prominent URL pointing to a domain associated with phishing or malware distribution. The document body, though heavily obfuscated, suggests a lure related to device hard resets, a common tactic for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://druttle.ru/123?utm_term=oppo+a83+hard+reset+file PDF link annotation
    • https://neriborotarisim.weebly.com/uploads/1/3/4/3/134345051/garemujuvibi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482872/normal_601db1f99d577.pdfIn PDF document text
    • https://kuzigojuzomuw.weebly.com/uploads/1/3/2/6/132683135/laxotobofuwudiw-sagopoto.pdfIn PDF document text
    • https://razixolinatu.weebly.com/uploads/1/3/4/3/134384461/jolineja.pdfIn PDF document text
    • https://nexijapa.weebly.com/uploads/1/3/5/3/135309594/fiveluz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374704/normal_5fe3e50d7ad67.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468274/normal_5fe60aa2a4123.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414342/normal_5ff31e786d2e4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489041/normal_5ff689bbe2c98.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pimepovume.pbworks.com/f/34406526778.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e33f4d76-c8fc-4a45-8e8e-1d7005567c4b/soleta.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5177fde9-00ea-4593-bdc5-a5d22f06e06f/sukovasaze.pdfIn PDF document text
    • http://febokipup.pbworks.com/w/file/fetch/144577848/astrology_answers_dawn_anne_reviews.pdfIn PDF document text
    • http://mujefapufefi.pbworks.com/w/file/fetch/144578934/rakenolokav.pdfIn PDF document text
    • http://vulazojab.pbworks.com/w/file/fetch/144574446/geometry_dash_meltdown_online_unblocked.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7365eb7-52ab-4707-b056-c1d0cf652b3f/26944477067.pdfIn PDF document text
    • http://luwivaj.pbworks.com/f/minecraft_windows_10_hack_client_2020.pdfIn PDF document text
    • http://pudamalulera.pbworks.com/f/1983037590.pdfIn PDF document text
    • http://siwuromo.pbworks.com/f/76721305876.pdfIn PDF document text
    • http://fajopab.pbworks.com/f/modal_auxiliary_exercises_with_answers_for_class_8.pdfIn PDF document text
    • http://wuwazilizos.pbworks.com/w/file/fetch/144424872/taranath_tantrik_graphic_novel_download.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_off00010e24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E24 5516 bytes
SHA-256: 7f6b719dc6954e9866e7c101262b4f2680d71a4522619a2b9d7744a1a9ff3707
font_01_sfnt_off000120db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120DB 11112 bytes
SHA-256: a3e5e3c882117c15c147832fad72b5564c9822502ec091736ac353e5365a9588

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