Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bf0df6cfb51bffe…

MALICIOUS

PDF

71.2 KB Created: 2021-02-15 12:42:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 8a632849882ff5029f35e66225e74ea6 SHA-1: 4f1498a5019e83510fc1a6159c2a5399287b837f SHA-256: 8bf0df6cfb51bffee30707ce6d533fa52c0ba340c6297e7a3389b4cb276e9361
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to PDF files hosted on various domains, suggesting a link farm or redirection scheme. The primary URL, 'https://jacksth.ru/strik?utm_term=sword+art+online+fatal+bullet+gameplay+ps4', is likely part of a phishing or malware distribution campaign. While no scripts were explicitly extracted, the PDF structure and extensive external linking are indicative of malicious intent, potentially leveraging embedded JavaScript for further actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 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.
  • 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/strik?utm_term=sword+art+online+fatal+bullet+gameplay+ps4 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4384484/normal_60265e6ad7274.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415936/normal_5fdfd69cc9308.pdfIn PDF document text
    • https://lorufolirosob.weebly.com/uploads/1/3/4/5/134584190/2077792.pdfIn PDF document text
    • https://domilejoxu.weebly.com/uploads/1/3/4/5/134529458/kaxorola-jarof-pujomoderopa.pdfIn PDF document text
    • https://zagibekopawof.weebly.com/uploads/1/3/1/4/131453283/javagil-xotitala.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426828/normal_5fec3cc9d0cef.pdfIn PDF document text
    • https://zobanegasub.weebly.com/uploads/1/3/1/1/131164549/mamemopimujagepul.pdfIn PDF document text
    • https://bagetakibejo.weebly.com/uploads/1/3/1/8/131871627/6248196.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374535/normal_5ff0e1bba8bc0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418170/normal_5ff514023e801.pdfIn PDF document text
    • https://luwagibefex.weebly.com/uploads/1/3/5/9/135966535/fabosajedu.pdfIn PDF document text
    • https://wipibafupegivu.weebly.com/uploads/1/3/4/8/134868488/tatumipu_vifateru_gipup_vobotapirumomex.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444638/normal_6003df55ed837.pdfIn PDF document text
    • http://tatajosak.22web.org/zosedexeralawafegoka.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456705/normal_5ff239e24ec65.pdfIn PDF document text
    • https://babexunerasosib.weebly.com/uploads/1/3/4/6/134620176/671086.pdfIn PDF document text
    • https://jubolovewo.weebly.com/uploads/1/3/1/4/131453214/gebewuxu.pdfIn PDF document text
    • https://geliwesirodired.weebly.com/uploads/1/3/1/3/131382982/9820008.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500882/normal_60263fa650dcf.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
    • http://titizobilane.epizy.com/56334962582.pdfIn PDF document text
    • http://tokavasetalan.epizy.com/ante_up_busta_rhymes_song.pdfIn PDF document text
    • http://tumofif.rf.gd/bootcamp_windows_support.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_off0000c959.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC959 5768 bytes
SHA-256: 082ba2fd814387f6f3be8b1918d94864c8f4662cf8b35d9e3c4d25a095680f0f
font_01_sfnt_off0000dcf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCF3 10372 bytes
SHA-256: 13d88b0df70612c2b9c7ccbbab455083f04cc24d92847547567d5b97ba42832b
font_02_sfnt_off0001007a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1007A 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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