Malicious PDF — malware analysis report

Static analysis result for SHA-256 589b4d306e110808…

MALICIOUS

PDF

122.4 KB Created: 2021-02-07 00:16:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: b8ad7b179ba65988fa5368c970eab325 SHA-1: 9c45fc60dcfbd54422540deef53f0937e0729082 SHA-256: 589b4d306e110808dcdd997a2fe22040946f43c766d9c936938ce06c26ba6fdd
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, suggesting a phishing or malicious redirection attempt. The embedded URLs, such as 'https://baarspo.ru/123?utm_term=minecraft+fluid+cow+breeding', are likely intended to lead users to compromised or malicious sites. ClamAV detection as 'Pdf.Phishing.Trojan' further supports the malicious nature of this document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://baarspo.ru/123?utm_term=minecraft+fluid+cow+breeding PDF link annotation
    • https://fatilisuwojumo.weebly.com/uploads/1/3/4/6/134652656/67c7abe454.pdfIn PDF document text
    • https://rewemekekebaz.weebly.com/uploads/1/3/1/4/131406535/1898762.pdfIn PDF document text
    • http://tophomework.space/sas_visual_data_mining_and_machine_learning_on_sas_viya_interactive_machine_learningrpxnn.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375339/normal_5fcecd1101227.pdfIn PDF document text
    • https://welaxulisura.weebly.com/uploads/1/3/4/0/134042468/fivudirove-sexitet.pdfIn PDF document text
    • https://vixugusimuxomuj.weebly.com/uploads/1/3/0/9/130969476/todazi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385214/normal_5ff0e2723ae09.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/purufiz/81919450415.pdfIn PDF document text
    • https://s3.amazonaws.com/xojafemori/static_gk_capsule_2019_gradeup.pdfIn PDF document text
    • https://s3.amazonaws.com/mogedozara/beauty_and_the_beast_piano_solo.pdfIn PDF document text
    • https://s3.amazonaws.com/wexukufedepim/8842873881.pdfIn PDF document text
    • https://s3.amazonaws.com/mesixadelomomo/information_report_editing_checklist.pdfIn PDF document text
    • https://s3.amazonaws.com/faluzotixupi/xoluniduwoxe.pdfIn PDF document text
    • https://s3.amazonaws.com/vavejijitatofu/first_aid_sign_template_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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001a2ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A2ED 5248 bytes
SHA-256: a792230869ac7a40d4901a39d01f8be6849bed84e2963d149c60c413863c136c
font_01_sfnt_off0001b4f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B4F5 11588 bytes
SHA-256: 2ff8a2ec580822c3e02b7163677d3239b725b76dbad4f7f19e94e7ce1e63084f

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