Malicious PDF — malware analysis report

Static analysis result for SHA-256 63dd066051050302…

MALICIOUS

PDF

69.1 KB Created: 2020-11-10 09:33:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 59ada17961d13f8b552b2d4c24602ea4 SHA-1: b9714d38e0de708f5cf89b43c26ee841b468d5b3 SHA-256: 63dd0660510503025eb84aa7a3e5f5fecdc0db8d0f2c29a259e16c91c44a0641
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with several pointing to known malicious redirectors and link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://cctraff.ru/123?keyword=beeman+p11+review
    • https://foxegakadop.weebly.com/uploads/1/3/4/3/134337736/monuluxi.pdf
    • https://bulipabuwalo.weebly.com/uploads/1/3/4/1/134131868/6dd50a6e2c.pdf
    • https://xirofepomare.weebly.com/uploads/1/3/0/8/130814083/radagonuluz.pdf
    • https://cdn-cms.f-static.net/uploads/4480182/normal_5fa8cfb100495.pdf
    • https://duzikasaropofe.weebly.com/uploads/1/3/4/4/134489835/6569067.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/wonoti/gotuwajiwaresoxobunesuwu.pdf
    • https://uploads.strikinglycdn.com/files/e14b552d-ac89-4afc-a44f-8b71ca7bdc64/muxixerax.pdf
    • https://uploads.strikinglycdn.com/files/2bfad5a3-1c51-42d5-b7aa-4f371bb23edb/gagegexo.pdf
    • https://uploads.strikinglycdn.com/files/965fe962-25d0-4957-8f73-2f9ed512c470/54478452043.pdf
    • https://uploads.strikinglycdn.com/files/6584390c-22b8-41e6-8c50-4a6db3939ad6/a_minimum_value_below_which_a_company_cannot_issue_no-par_stock_is_called.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c6c3.bin
13d1f826f88059b6b96d004372eb8c62bcc658735d7e170c105329fa300dfbe2
pdf-font-stream PDF embedded font (sfnt) at offset 0xC6C3 4604 bytes
font_01_sfnt_off0000d648.bin
1bddcbea13dc0d8ee1f1c7b7e11ba251d7d90aa0f78a76a3dffbe84096810f3d
pdf-font-stream PDF embedded font (sfnt) at offset 0xD648 10556 bytes
font_02_sfnt_off0000fa32.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
pdf-font-stream PDF embedded font (sfnt) at offset 0xFA32 4324 bytes