Malicious PDF — malware analysis report

Static analysis result for SHA-256 adaacb938d6588c7…

MALICIOUS

PDF

67.8 KB Created: 2020-11-16 20:39:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 09a2894747d3cdda5d34c373378e434a SHA-1: bffcc447b47d92659a9f7468be9e1af0e045f239 SHA-256: adaacb938d6588c706dac77aabec422f32167f093e5738be37ecfd8b8b87b665
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 significant number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various websites, including a Weebly hosted PDF. One of the primary URLs is `https://trafficel.ru/strik?utm_term=see+you+at+the+top+zig+ziglar+youtube`. The ML classifier and ClamAV detection strongly indicate maliciousness, consistent with a phishing or link-farming attack pattern. No scripts were extracted, but the structure suggests an attempt to redirect users to malicious or spam-laden content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafficel.ru/strik?utm_term=see+you+at+the+top+zig+ziglar+youtube PDF link annotation
    • https://pefojefevofat.weebly.com/uploads/1/3/4/6/134659321/c16011f3c74071.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365598/normal_5fa6446b9527f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369493/normal_5fa22e1bcd715.pdfIn PDF document text
    • https://sefedajexoxoj.weebly.com/uploads/1/3/4/4/134479396/a659b7a894dac.pdfIn PDF document text
    • https://wugemevafiditi.weebly.com/uploads/1/3/4/3/134382928/lotigo-zorudugete-donepofazu.pdfIn PDF document text
    • https://zizuralozirufu.weebly.com/uploads/1/3/1/4/131483034/742164.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489607/normal_5fb255caf052c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446492/normal_5fa7e8e672890.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369646/normal_5f91f209efe83.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/mijedusovineti/93069205568.pdfIn PDF document text
    • https://s3.amazonaws.com/tuzakifezara/black_panther_watch_online_hd_free_123movies.pdfIn PDF document text
    • https://s3.amazonaws.com/zikeko/ceiling_plan_design_autocad.pdfIn PDF document text
    • https://s3.amazonaws.com/sedimeraxufi/fake_louis_vuitton_receipt_template.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_off0000cd80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD80 5296 bytes
SHA-256: 9a4d984fb5d0b77bea4296e2d46d7e91ce4d0f11b20682fd78d51509a8d530bb
font_01_sfnt_off0000df8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF8F 10064 bytes
SHA-256: d251f4ddf3e3c8b0d20457f27a669dce0917673554921bc724d116d9a3a736c2

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