Malicious PDF — malware analysis report

Static analysis result for SHA-256 42540ac5ed425b0b…

MALICIOUS

PDF

66.6 KB Created: 2021-01-30 12:47:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: d428479341351cfd8e6d10f9d1712cab SHA-1: 96f7972b54c3134859c0390080ae27ba7579ede6 SHA-256: 42540ac5ed425b0bf87d97b2ecc401da51890eed9e644a78c14385336a929244
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, suggesting an attempt to drive traffic to various websites. One prominent URL, 'https://jacksth.ru/123?utm_term=unblocked+zombie+games+dead+zed', appears to be a lure for game-related content. ClamAV detection as 'Pdf.Phishing.Trojan' and ML classification further support its malicious nature. No scripts were extracted, but the structure and embedded URLs indicate a phishing or traffic-driving campaign.

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
  • 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/123?utm_term=unblocked+zombie+games+dead+zed PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4470533/normal_5fccec644ddc3.pdfIn PDF document text
    • https://vulabomanuxuw.weebly.com/uploads/1/3/4/8/134857085/jagobalixidebiloso.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404108/normal_5fffbac5275a8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418778/normal_5ff4365345c10.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366325/normal_5fd0ba8c7c704.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366004/normal_6003b18ea03de.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369788/normal_5ff6675d8d4c3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492250/normal_5fe55fe958b0f.pdfIn PDF document text
    • https://ginugifugebiner.weebly.com/uploads/1/3/4/2/134234672/lutet-dimoropuf.pdfIn PDF document text
    • https://cdn.sqhk.co/xiladuxe/ljgJ4id/rutusudejeweraparibegakus.pdfIn PDF document text
    • https://xovigojimere.weebly.com/uploads/1/3/4/8/134854331/9c39324319f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407562/normal_5fe3b351eb203.pdfIn PDF document text
    • https://fazodokivev.weebly.com/uploads/1/3/4/0/134018208/gurulufafokajesa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458838/normal_5fe8a6644215e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370077/normal_5fe10e2482542.pdfIn PDF document text
    • https://cdn.sqhk.co/lituxopevuk/1r0zWx2/siriwugirafebasul.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387229/normal_5fe8c3855c067.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bajobakokela.epizy.com/petta_audio_songs_tamil.pdfIn PDF document text
    • http://botasalipigu.epizy.com/samawelapanalumepofel.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_off0000c84e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC84E 5408 bytes
SHA-256: 2b16f5a6f262de4f2e622b25188c820fd850801821b9e0170b47c37e74064ecf
font_01_sfnt_off0000daaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAAA 10124 bytes
SHA-256: 4232dcd08ccdb3c53b62f92b14411ed32a12d4a3f9ad9e9a37c8af7c035e1bcf

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