Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3b3324cabba6fa8…

MALICIOUS

PDF

69.2 KB Created: 2021-02-22 02:16:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 2b0082973472b3b20b7a1d038d780fa0 SHA-1: 2d4c3cf2dd8df2a644fb2ab949c06f43b708c6ca SHA-256: f3b3324cabba6fa84dd74d9d45f6440a7a9c0bd37c2a6eb85c86d44ac2195015
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing site. No scripts were extracted, but the presence of an external URI strongly suggests a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jottigo.ru/wix?keyword=the+polar+express+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4456135/normal_5fc959a732bf6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450158/normal_5ffe417b01b3b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416653/normal_600c512edb1c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450250/normal_5fd102d4ac6eb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456369/normal_5fd9b6488da15.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453098/normal_60264d9223b44.pdfIn PDF document text
    • https://cdn.sqhk.co/kufejeni/q6ieFgc/the_tiger_king_netflix_wiki.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367914/normal_6000caf258b5f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388818/normal_5fe77f79d1bc4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446491/normal_5fd2a244429e2.pdfIn PDF document text
    • http://rekusigixebisuk.22web.org/xuvajetupufu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496616/normal_5fe9f3e9e5c95.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408858/normal_5fe1ea052ca0e.pdfIn PDF document text
    • http://www19216801.site/niv_bible_study_commentary_review2b1fv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404123/normal_5fcdd1a2d934d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jumirasex.epizy.com/910565308.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_off0000d36a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD36A 5144 bytes
SHA-256: e5c0030b12c5ac9f1201618cfce79ef606ecf8c2cd7cdf2d7466d2406c4bb60d
font_01_sfnt_off0000e4e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4E5 10308 bytes
SHA-256: 317d240d3008e00880eea943f4a20a69146e28eabb22c8f8139a8d39d0d05c13

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