Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b94346eacceef6d…

MALICIOUS

PDF

65.4 KB Created: 2021-02-18 02:44:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 7189f1d207611866323d91b82d76f696 SHA-1: 344fb2dc5d65d4de6223872c80aa4e12419e1b88 SHA-256: 4b94346eacceef6dd883ba30c2dd8daf1064349349d8a63617e417909c1218db
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external websites, suggesting a link farm or phishing attempt. One critical heuristic indicates a link to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious activity.

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 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.
  • 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=calvin+and+hobbes+books+near+me In PDF document text
    • https://cdn.sqhk.co/nananava/6is8Cjq/xarenobalibozejalani.pdfIn PDF document text
    • https://mavezuwunokil.weebly.com/uploads/1/3/4/6/134627141/4633228.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485156/normal_5feb3909cd98e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403119/normal_5ffed2982e9b0.pdfIn PDF document text
    • https://novigavaze.weebly.com/uploads/1/3/0/8/130874354/fanaduvepivomanan.pdfIn PDF document text
    • http://guvizaw.22web.org/resigesutewopata.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484639/normal_60039383174b8.pdfIn PDF document text
    • https://pasadotofeb.weebly.com/uploads/1/3/1/4/131482919/8565261.pdfIn PDF document text
    • https://cdn.sqhk.co/famuxina/jeidihC/planet_of_the_apes_2017_mark_wahlberg_cast.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404290/normal_5fe5e5e5035a2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415300/normal_60131d6a977d9.pdfIn PDF document text
    • https://cdn.sqhk.co/rogenujudita/cFjarja/descargar_catan_classic_apk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/tutasujal/neural_network_in_r.pdfIn PDF document text
    • http://lubuzasoxevixan.epizy.com/textbook_of_medical_oncology.pdfIn PDF document text
    • http://sumojoripira.rf.gd/prisms_and_pyramids_worksheets_grade_4.pdfIn PDF document text
    • http://malinaliwul.epizy.com/chader_hashi_badh_bhengeche_free.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b62c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB62C 5060 bytes
SHA-256: bd5b3948923c5b2b3c8018815bbf3f56a7d84c4addefb901ef1434497a44c327
font_01_sfnt_off0000c726.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC726 10204 bytes
SHA-256: 587b3ddb80a7ce0da37b3a5a546d63ecb11ea8ef6bc6689136226da4223edc1c
font_02_sfnt_off0000ea2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA2C 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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