Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b48c943f47b8b4f…

MALICIOUS

PDF

70.6 KB Created: 2020-11-28 08:54:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 295678b9fe628c870c60a78d61ad714c SHA-1: 96b9e08deccc12dba1e149b4840b87a726922a23 SHA-256: 2b48c943f47b8b4f7cf05c89c45a0f9d48a46c9d70285bd602137344f68b37c8
204 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, many pointing to SEO-optimized content, suggesting a link farm designed to attract users under the guise of legitimate information like election results. The presence of a ClamAV detection for 'Pdf.Phishing.Trojan' and ML classification strongly indicates malicious intent. The primary malicious URL identified is traffset.ru, which is likely used to redirect users to a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://traffset.ru/aws?utm_term=maharashtra+vidhan+sabha+election+results+2014+pdf PDF link annotation
    • https://buluzuzumaz.weebly.com/uploads/1/3/1/6/131636727/zizuvifor.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409814/normal_5fbed63d83081.pdfIn PDF document text
    • https://jiwepurojal.weebly.com/uploads/1/3/0/7/130775762/988fa418.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413374/normal_5f96398e85dbb.pdfIn PDF document text
    • https://totapige.weebly.com/uploads/1/3/1/4/131483287/6e2f6.pdfIn PDF document text
    • https://koworuvixoduto.weebly.com/uploads/1/3/4/3/134352933/3254428.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466679/normal_5fb7473f453ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376629/normal_5f9696a17fe1f.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/matogapibelifiv/41615256526.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62ec696d-03b9-4a1c-bdc2-066df180144e/58814952361.pdfIn PDF document text
    • https://s3.amazonaws.com/zoromexemuzid/55847037573.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/878d9d56-376d-49b2-86e2-4e0b65b2c990/linear_algebra_stephen_h_friedberg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2ea4b24-585e-49d9-83ec-064f3e763891/physics_halliday_resnick.pdfIn PDF document text
    • https://s3.amazonaws.com/lanorolowu/fegirogezefeviterise.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eaa2cf44-f55f-489f-891c-62db479aa423/55813668383.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_off0000d527.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD527 5860 bytes
SHA-256: 4f02562b84d44a20f3b5b0ded2db398c00670284b8b906d881baf2c5fba8f9f7
font_01_sfnt_off0000e92d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE92D 10640 bytes
SHA-256: e62393ae8c413bc58d152e700f5622afa22d44381c1981223a4c34483fede483

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