Malicious PDF — malware analysis report

Static analysis result for SHA-256 0509c539e594ccc1…

MALICIOUS

PDF

78.4 KB Created: 2020-12-20 16:51:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 466c5d164e2ffb911cb05f9dbd115054 SHA-1: 2dbf0def90ba89e460f2265f5d29fa64d9bcb261 SHA-256: 0509c539e594ccc1b66ba45af822fe50026498bcecdff955e18929cac21765db
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 0.9998

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://traffking.ru/123?utm_term=the+rise+of+theodore+roosevelt+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4421215/normal_5fdab7e8c4792.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383449/normal_5fc388fc25cec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372072/normal_5f98f5ffcfa5b.pdfIn PDF document text
    • https://jawizadobem.weebly.com/uploads/1/3/4/7/134773472/5a38ca006791.pdfIn PDF document text
    • https://wiwawuvagowe.weebly.com/uploads/1/3/4/4/134496439/0cd6a520ed9c376.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379029/normal_5fd1c20d370f4.pdfIn PDF document text
    • https://litazivufili.weebly.com/uploads/1/3/4/3/134305244/dd34040f4aef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464056/normal_5fdbd042a45f3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368242/normal_5fa6320d7eddf.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/5fc580a188c99b6d37c677f9/t/5fcc3913cded405bb8cb55dc/1607219479062/nefotopokatul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/929a81d9-6f5c-4199-aafb-ff8d145518ff/donededolutewojeguwo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4bf34b52-1ac0-468b-8136-540da107edb6/94765821570.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdd391cd610986319751208/t/5fdd5b7cf11f517dbbacedd8/1608342396763/new_sa_hip_hop_albums.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_off0000ce65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE65 13124 bytes
SHA-256: 6345699450c9918583d878c812fb3d675a355e88f873930cf7740a78ed3efd9e
font_01_sfnt_off0000f8b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8B2 4928 bytes
SHA-256: 3660cee98217b2d4d66667288af53d597a0d94c1140aba37b37242d5925464d4
font_02_sfnt_off0001097a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1097A 10316 bytes
SHA-256: 029f3ef54238c7042203f1869258c7d492e928c80fcb40868b35efb5fde4d25f

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