Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d89433e3245027e…

MALICIOUS

PDF

56.9 KB Created: 2020-11-01 22:04:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: ebd1c56145b6de8175faecb013c0919d SHA-1: 15c6f78f92fddd02cbb372782c4803db8e0ee763 SHA-256: 6d89433e3245027e8a2b3728f47a305fd5d54d334e1ae9be8a4301d5673201ce
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains embedded links that direct to a known malicious redirector URL, disguised as a key generator for Adobe Premiere Pro. The document body, though heavily obfuscated, contains references to this lure and the malicious URL. The ML classifier and the heuristic for malicious redirector links strongly indicate malicious intent, likely to deliver a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://gettraff.ru/strik?keyword=keygen+adobe+premiere+pro+cc+2017 In PDF document text
    • https://wekubuzebebam.weebly.com/uploads/1/3/0/7/130739705/fipatu.pdfIn PDF document text
    • https://taruzabob.weebly.com/uploads/1/3/4/4/134493447/jixubavewe.pdfIn PDF document text
    • https://nitaluba.weebly.com/uploads/1/3/4/3/134348735/femuv-maxoju-bedukufulen-vonof.pdfIn PDF document text
    • https://kegegizexuf.weebly.com/uploads/1/3/4/0/134042356/wigolajomijero-lisofaj-ritus.pdfIn PDF document text
    • https://bogemokized.weebly.com/uploads/1/3/4/3/134386998/c9e02d109cceb9.pdfIn PDF document text
    • https://varipejat.weebly.com/uploads/1/3/0/7/130739080/xotiletula.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://uploads.strikinglycdn.com/files/ceba7efa-f021-4adf-98c5-6ac01c634ae8/ap_calculus_bc_multiple_choice_released_exams.pdfIn PDF document text
    • https://s3.amazonaws.com/rebesudanolo/57112830014.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/4660/0341/files/vunoxesudolowitadolunupe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/edd66790-c71e-4ae2-a78c-83573e7a1d91/fondy_unblocked_games_coffee_shop.pdfIn PDF document text
    • https://s3.amazonaws.com/mamukawaxatali/what_is_a_stock_character.pdfIn PDF document text
    • https://s3.amazonaws.com/betimugi/nedib.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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006925.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6925 5800 bytes
SHA-256: aa3e65a587658919bc31a60b2b19b6c664b1568e1122c1f450aaf4bbfaa99b35
font_01_sfnt_off00007ce2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CE2 9316 bytes
SHA-256: dadc982136b2fc6f597e3471cb3d974ec6d66f515cfbb1c29600e7ecc3e374c0
font_02_sfnt_off0000973d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x973D 10748 bytes
SHA-256: a7812b708621a6815d38d2675d5ba36bb71d8f31d1c3221b74eea72db93eedcf
font_03_sfnt_off0000bc28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC28 17344 bytes
SHA-256: 3a90c7a3dc772d5a211e2eff06854e845cbd6010742b2efe61bbc1f148f3f63e

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