Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0587b4f8e844798…

MALICIOUS

PDF

58.0 KB Created: 2020-11-30 22:24:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 6825cac70d5800e93154889067b2ee44 SHA-1: de36d67a63ab64da127a70c4dc75ce062f86c973 SHA-256: f0587b4f8e844798dea9a44f51f68d6e70a504dd194118d20113c2d33f43a150
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 0.9996

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://trafffe.ru/strik?utm_term=for+honor+discord+server+reddit PDF link annotation
    • https://niwonuruvi.weebly.com/uploads/1/3/4/7/134767359/fubulupexo-podipus-wobajudoxu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368746/normal_5f89f940f2d17.pdfIn PDF document text
    • https://sibakixode.weebly.com/uploads/1/3/2/8/132814768/dofelamidagalofux.pdfIn PDF document text
    • https://bemaxeviliw.weebly.com/uploads/1/3/4/4/134482954/ruledazirivixodevoje.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fbffc42bda9c57a97b92422/t/5fc1b4db9d79364840cdb125/1606530267408/37454973288.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf4f6feaf37e3b649256ad/1606373232655/formula_for_average_velocity_and_acceleration.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f186bda9c57a97be6d6b/t/5fc1270161e25426e1615f7e/1606493955751/15449594600.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc14b808139af037647f366/t/5fc3ea7c3c02f22b9d859da7/1606675068826/physics_rumor_mill.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0eac55bcb0228a2828fa5/t/5fc28aa45147b14804857b5c/1606584996441/20779609527.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe068c1972c46e3c662443/1606289036495/bugajibokirid.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbfeb102bbd74065800e14d/t/5fc4639fe18c5c478e8802a5/1606706082273/estates_of_the_realm_definition.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe03b108845d092450efbe/1606288309850/7261329378.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_off0000aa39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAA39 4800 bytes
SHA-256: 2e1b8a69fb83315ff83fdbaf2f9f3f6b0817abcf7488331a74acbcd273aa4d1e
font_01_sfnt_off0000ba8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA8F 9700 bytes
SHA-256: 69fc1c477bf61a3d3364c866c6aa8433d45fdf46ac824217967f3fdce9f4b294

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