Malicious PDF — malware analysis report

Static analysis result for SHA-256 5621abfe8185171e…

MALICIOUS

PDF

70.8 KB Created: 2020-11-21 17:44:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 42f183a162af46388966146f232e6e16 SHA-1: 9aa2715dbe31bdb5390c871f8d5d2ed21671a6a6 SHA-256: 5621abfe8185171e3040ba809226022fafbab69b6cea6c2f69f52ba3b2b213d1
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics, including critical alerts for malicious redirector links and a link farm. The embedded URLs point to infrastructure known for distributing malware or phishing content. While no scripts were explicitly extracted, the PDF structure and link farm indicate an attempt to lure users to malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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://ggtraff.ru/123?utm_term=dragon+ball+z+final+stand+wiki+saiyan In PDF document text
    • https://biwawabagukolaz.weebly.com/uploads/1/3/4/7/134730268/sabulomozewumop.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366336/normal_5fa0ca2dd4b5f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496812/normal_5fb7b153718d0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386349/normal_5f95969146bb9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379852/normal_5f8f469912c0f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374954/normal_5f8c1b98cf799.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/29d805ce-90dd-49c4-a633-4eab7283e6a3/91256134290.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc70084e-a478-431e-aa14-eaa53ad4a830/dutol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ecef7371-3397-4543-92cb-ebb0904bf38b/nopupikawizu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/114887d4-d610-4000-96c7-505bd2f91128/vunaritajepidumabif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0872b8c-c51c-43e5-80a9-edb713ba8757/star_wars_kotor_2_save_editor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4c5b2bd-6627-4c54-b9ee-acc28c6dd5d5/xelesawagolomotedoroloz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e89f333-fc9a-4385-9ada-a40cde24a388/barilatofu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3daa69fe-7094-4759-b319-3bed1bc56158/brave_new_world_and_1984_compare_and_contrast_essay.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ed41175-07cc-42ad-a641-650e68e0c950/gixigijinalaralitadez.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cb71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB71 3156 bytes
SHA-256: 4dc304cb6ac5a06a9e6b1d13e691de7afc69d31b254e085a7af19832df1bc8ef
font_01_sfnt_off0000d6a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6A8 5524 bytes
SHA-256: 3add4db41e122f3ecefdf61bf1522389353c8ac92c60f2abea65eb3361b2069e
font_02_sfnt_off0000e9a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9A8 10732 bytes
SHA-256: b28f9f2332611dd0cd889f6f5dc5f6dd3271050b962fb4eab35946e385896ae7

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