Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba1beb1848674551…

MALICIOUS

PDF

73.1 KB Created: 2021-02-26 05:23:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: b7a20a55d9f41a512fb9847ab35791ea SHA-1: 771ce8ce46927768eb690ef37e76c8666ea6e6cf SHA-256: ba1beb18486745515ad17469c04f8444d32e1099750a254707c2275008d0cc14
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 PDF files, suggesting a link farm or SEO manipulation tactic. One prominent URL, 'https://crophysi.ru/award?keyword=briggs+and+stratton+horizontal+shaft+engines+for+sale+australia', is flagged as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/award?keyword=briggs+and+stratton+horizontal+shaft+engines+for+sale+australia In PDF document text
    • https://static.s123-cdn-static.com/uploads/4419836/normal_5fecef966bba2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492593/normal_5fe38ec9659a0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500447/normal_5fca405ed8947.pdfIn PDF document text
    • https://doruxajowivabog.weebly.com/uploads/1/3/4/8/134870444/tuxafoki-besuvemet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454679/normal_601628ef5bb3b.pdfIn PDF document text
    • https://zapidowezagija.weebly.com/uploads/1/3/4/0/134041255/d615682d9d64.pdfIn PDF document text
    • https://buxudirikebipur.weebly.com/uploads/1/3/1/1/131164004/31273f6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417997/normal_6003d001df5d1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451039/normal_5fc5c13db2683.pdfIn PDF document text
    • https://noresewikikizi.weebly.com/uploads/1/3/1/4/131453465/05953.pdfIn PDF document text
    • https://zotagozugub.weebly.com/uploads/1/3/0/7/130739891/47a446a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370080/normal_601419c04b038.pdfIn PDF document text
    • https://zowadadevifu.weebly.com/uploads/1/3/4/5/134597758/f5e530072c6.pdfIn PDF document text
    • https://gawosiluzetur.weebly.com/uploads/1/3/4/6/134631715/zuwuveduwisezix-gapanoxinotefur.pdfIn PDF document text
    • https://bujefodamefizup.weebly.com/uploads/1/3/1/0/131070612/nipeli.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://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_off0000d27d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD27D 5152 bytes
SHA-256: 12b945349dc884949a7177bacceacb351dbc41c9c08b64ac8354d872c69b33b6
font_01_sfnt_off0000e3ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3FF 10640 bytes
SHA-256: 5f54678730097f7bd8d7a41d2c48e99f4490ffa4c7b84767fc3025512d6823e0
font_02_sfnt_off00010876.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10876 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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