Malicious PDF — malware analysis report

Static analysis result for SHA-256 36a27de1673b2ab0…

MALICIOUS

PDF

92.5 KB Created: 2021-05-05 14:46:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 195ecdd17d9a49571fd6ce66ae7d5dff SHA-1: d75913f28d7cd295919ed6299402c234275e426e SHA-256: 36a27de1673b2ab031d0646469dbd503f5479325bdc101ca0e5c835e31c89596
186 Risk Score

Malware Insights

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

The file is a PDF that exhibits characteristics of a link farm or SEO spam, with numerous external links, many hosted on disposable domains. The ClamAV detection and ML classifier strongly indicate maliciousness, likely related to phishing or malware distribution. The embedded URLs suggest an attempt to redirect users to malicious sites, potentially for exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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.
  • 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://leonvi.ru/strik?utm_term=whirlpool+refrigerator+dealer+in+vadodara PDF link annotation
    • http://sewatumafuta.medianewsonline.com/ingenuity_inlighten_baby_swing_reviews.pdfIn PDF document text
    • https://cdn.sqhk.co/webunojixisa/xigjdid/girl_skins_for_minecraft_app.pdfIn PDF document text
    • https://cdn.sqhk.co/silakozafi/dOqhhij/stevia_cultivation_project_report.pdfIn PDF document text
    • http://siwupojotuj.getenjoyment.net/41862526173.pdfIn PDF document text
    • http://xozowilozoga.mywebcommunity.org/rodas_da_vida_anodea_judith.pdfIn PDF document text
    • https://cdn.sqhk.co/xapewiwud/ii9jagd/xekojiwetitox.pdfIn PDF document text
    • https://cdn.sqhk.co/soxemudu/4eZhage/pomodozid.pdfIn PDF document text
    • http://sugameloxufe.mywebcommunity.org/32503949080.pdfIn PDF document text
    • https://cdn.sqhk.co/zadoweferoxe/gtICih3/sudoku_puzzles_medium_printable.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ef5e9b3f-1a8e-4c79-9b60-34b8f8133c96.filesusr.com/ugd/18574e_9dbdb96f4f5248d584b14afb55bf1b07.pdf?index=trueIn PDF document text
    • https://f579be4a-c2ec-451d-94ee-532237c06880.filesusr.com/ugd/9f6a24_5d7d2efeead849cfb164175de0ea1654.pdf?index=trueIn PDF document text
    • https://e0eedba4-cf99-4c42-97f5-d3f9ae5832dd.filesusr.com/ugd/e36ea7_91cf59d3f8c747faa7292d51ef4d6c7c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4be41d2f-1fbf-4ccc-bd34-6aac1e2e01b7/90439480549.pdfIn PDF document text
    • https://8c77b9b7-c39b-43d6-9406-6086bd2c0f93.filesusr.com/ugd/ee6770_41e47d63319f4fdb9ec01072d02d6437.pdf?index=trueIn PDF document text
    • https://f405dec1-7f90-4f4c-a861-5286f67d0127.filesusr.com/ugd/ab922d_b6834bfa9b5344599b0a311b400d4623.pdf?index=trueIn PDF document text
    • http://radiviwix.onlinewebshop.net/44789419847.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f54727a7-afe7-4d32-808a-2c0696cd2479/how_to_enable_m.2_in_bios_asus_2019.pdfIn PDF document text
    • https://788ae96d-7a4f-4726-91a9-07bb742fb3e7.filesusr.com/ugd/97aff7_b37588e975014a92b2255b40a975ea7f.pdf?index=trueIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012b54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B54 5196 bytes
SHA-256: 8a3ad00ec51411e5af9361cdd5469a65d7b8a385325e8c628f7d92cb1aa5dcf3
font_01_sfnt_off00013d11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D11 11688 bytes
SHA-256: d0ccf398568b3893ce226d4cb1887cdacf4787e42f50eb3ef0ee760fae4933a2

Open this report in the interactive analyzer, or submit your own file for analysis.