Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cf93371e1035d5b…

MALICIOUS

PDF

81.0 KB Created: 2021-02-22 12:31:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 5642989daeed6c4960f9710450e28bcf SHA-1: b8452f843d274e74ffdbb9baf8263b41e2ad985a SHA-256: 8cf93371e1035d5b1e9f8a018821c6cbdb50a463ae4ca935af1a3296797ad4d0
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://crophysi.ru/strik?utm_term=is+flowers+in+the+attic+a+horror+movie PDF link annotation
    • https://kewidanuratug.weebly.com/uploads/1/3/5/3/135323433/10b3f.pdfIn PDF document text
    • https://bitusuverutito.weebly.com/uploads/1/3/1/8/131871453/xejugokira.pdfIn PDF document text
    • https://cdn.sqhk.co/fematixub/iuQhajd/92973345129.pdfIn PDF document text
    • https://sawamamuwez.weebly.com/uploads/1/3/5/9/135992332/tiwolarusasad.pdfIn PDF document text
    • https://biwojifagape.weebly.com/uploads/1/3/1/3/131381518/xozazezuju.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411709/normal_601160bfd9c9a.pdfIn PDF document text
    • https://wefapewirevuvik.weebly.com/uploads/1/3/4/6/134667644/nituxigogegivuf.pdfIn PDF document text
    • https://joxoxego.weebly.com/uploads/1/3/4/6/134664344/1024717.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408863/normal_60172646c754b.pdfIn PDF document text
    • https://vamubediva.weebly.com/uploads/1/3/4/9/134901044/fb9389defd8dc5.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/tobito/37234004647.pdfIn PDF document text
    • https://s3.amazonaws.com/dutimajizowa/revista_natura_ciclo_14a_2018_argentina.pdfIn PDF document text
    • https://s3.amazonaws.com/bodajaku/how_to_make_a_mango_banana_smoothie_without_yogurt.pdfIn PDF document text
    • https://s3.amazonaws.com/nunakixuma/baxuju.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f26a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF26A 5000 bytes
SHA-256: 465429328f3653b6d176bcb1e01b21596c9e2471294235b4607fa7fb46588d18
font_01_sfnt_off00010342.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10342 11040 bytes
SHA-256: 36bf8e4910e696257dab01b0c17f46d4c6757b12c4bca3bdc299b6cc0a37a31c
font_02_sfnt_off000128d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128D9 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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