Malicious PDF — malware analysis report

Static analysis result for SHA-256 495785105dfc3493…

MALICIOUS

PDF

77.3 KB Created: 2021-02-15 18:26:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: ee0e41a6abc5bf30fae6e72dff4d4af9 SHA-1: c1c255868c75848496007aae605c940101a8a756 SHA-256: 495785105dfc349371afbaa470f21d931830544047397fd4a7518d16ba35bc72
184 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical finding for redirecting to known malicious infrastructure. The embedded links, such as 'https://crophysi.ru/strik?utm_term=sustainable+development+goals+targets+and+indicators', are designed to lure users to potentially harmful websites. The ML classifier also strongly indicated maliciousness, supporting the overall assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than 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.
  • 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://crophysi.ru/strik?utm_term=sustainable+development+goals+targets+and+indicators In PDF document text
    • https://nedetuvozuwe.weebly.com/uploads/1/3/4/6/134699612/fojifumil.pdfIn PDF document text
    • https://nuvisinuxaxo.weebly.com/uploads/1/3/1/3/131383681/dokejebixotasi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490934/normal_5ffcbe029ce8a.pdfIn PDF document text
    • https://sidomepavoresob.weebly.com/uploads/1/3/5/3/135322675/7057487.pdfIn PDF document text
    • https://todoxaladavefuk.weebly.com/uploads/1/3/4/5/134529573/cef0768297152.pdfIn PDF document text
    • http://ogranicbio.space/neverwinter_searching_the_present_document_locationsticmj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378425/normal_6002e8d479c66.pdfIn PDF document text
    • http://hydraruzxpnew4af.exchange/2469737185jzcq7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454990/normal_5ffb7bced3619.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fixiwerasame.rf.gd/wallpaper_in_hd_for_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/gaxuremewuger/86427116432.pdfIn PDF document text
    • http://radujexoxetapil.epizy.com/zuketalilipubegaderus.pdfIn PDF document text
    • http://deroselewem.epizy.com/airplane_racing_games.pdfIn PDF document text
    • http://lugegurofeso.epizy.com/samsung_washing_machine_and_dryer_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/vabedafozo/faseminavipusavelub.pdfIn PDF document text
    • https://s3.amazonaws.com/dozore/xujagulebasivonuxunanenab.pdfIn PDF document text
    • http://reluwiz.epizy.com/zivet.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_off0000f01e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF01E 5696 bytes
SHA-256: da264166e138cee5afef568b8388489af7a1c3a333891d405c6f4ddccc895dd0
font_01_sfnt_off00010371.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10371 10700 bytes
SHA-256: 507cd46bd848110477824f64a9efa799c32fdfd4e662dfaa89369fe7cc181762

Open this report in the interactive analyzer, or submit your own file for analysis.