Malicious PDF — malware analysis report

Static analysis result for SHA-256 fae34ced833c9af2…

MALICIOUS

PDF

83.6 KB Created: 2021-05-19 02:00:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 33a1efcf707a4928d9f8595dca88ce14 SHA-1: 0c8ee0a56045c7abaf08bf6068efac6474b48e30 SHA-256: fae34ced833c9af2cab528677866170d34643863f03b85a127e89e5e235de3aa
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of external links, many of which are likely part of a link farm designed to redirect users to malicious sites. The primary malicious URL identified is https://nipisod.ru/strik. While no scripts were explicitly extracted, the PDF structure and the heuristic firings strongly suggest an intent to redirect users to potentially harmful content.

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 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://nipisod.ru/strik?utm_term=is+vsdc+video+editor+free PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4468814/normal_602ce575a32c2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392868/normal_5fd7e9c559912.pdfIn PDF document text
    • https://mefimume.weebly.com/uploads/1/3/1/4/131437875/kalezonexuz.pdfIn PDF document text
    • http://fasumidivojasuj.iblogger.org/tosililamuzudabobodos.pdfIn PDF document text
    • https://melokiziw.weebly.com/uploads/1/3/4/6/134669089/kakafaga-turofolizanofuk-wuzunotuka-lelula.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374024/normal_5fd1e1dc9c047.pdfIn PDF document text
    • https://zokupirijega.weebly.com/uploads/1/3/4/0/134000213/2395715.pdfIn PDF document text
    • https://kawutakupilim.weebly.com/uploads/1/3/4/2/134236314/cc8bf5e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9e0b295-0fd6-4e9c-af1f-f218d56d3fdc/pujetarojomiwejuwavaruba.pdfIn PDF document text
    • http://lopogoroje.rf.gd/72771685093.pdfIn PDF document text
    • https://s3.amazonaws.com/gorajikunobixi/1409773769.pdfIn PDF document text
    • https://s3.amazonaws.com/bidemewufa/bluetooth_pc_windows_8.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4c01f0f-f8a5-4ab2-bc96-0bf7a42c1828/93880235587.pdfIn PDF document text
    • https://s3.amazonaws.com/zugutixe/alphabet_letter_templates_free_printable.pdfIn PDF document text
    • http://xadaxaxug.epizy.com/kaxideta.pdfIn PDF document text
    • https://s3.amazonaws.com/jewizopukuni/73170347010.pdfIn PDF document text
    • https://s3.amazonaws.com/bitizopovopaso/area_of_rectangle_worksheet_grade_6.pdfIn PDF document text
    • http://repajazofuwide.epizy.com/12906072128.pdfIn PDF document text
    • https://s3.amazonaws.com/davubewu/96957346274.pdfIn PDF document text
    • https://s3.amazonaws.com/senodiw/sasopodadofaxirebot.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_off0001090e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1090E 4772 bytes
SHA-256: 807318f5ced693635e680da4e22408d01afadec76f69141a76a3554de423d632
font_01_sfnt_off0001195f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1195F 11876 bytes
SHA-256: 978ad0b257cce2a5e13110a8f05d1abf0ed496b0a1d1cd6140a46d93a35e579b

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