Malicious PDF — malware analysis report

Static analysis result for SHA-256 e02da5c2ad1ac16f…

MALICIOUS

PDF

76.1 KB Created: 2021-03-27 15:34:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 8f8727fe592187ceb6a55165de5055d0 SHA-1: 5357d5fe0ed3a6516c6345bbd2769feb1caf8e15 SHA-256: e02da5c2ad1ac16f77c5b472362762492d9c32aa3e10b76758d2c7a264297242
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://fokemale.ru/123?utm_term=vietnam+real+estate+market+report+2019 PDF link annotation
    • http://mivifukatovaga.getenjoyment.net/14101392059.pdfIn PDF document text
    • https://fekebejoluxoji.weebly.com/uploads/1/3/4/3/134309121/sasex.pdfIn PDF document text
    • https://wejowijugoli.weebly.com/uploads/1/3/1/3/131383775/4687284.pdfIn PDF document text
    • https://lefofikik.weebly.com/uploads/1/3/5/3/135316562/669c04f098.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://976edc35-935c-46de-9e6e-e225dbc25668.filesusr.com/ugd/0829d8_221fcf8e8e4645a6bbd65f09edcb6321.pdf?index=trueIn PDF document text
    • https://efe523a3-d756-4f55-ba91-412f3a718e00.filesusr.com/ugd/236571_893cfa2d336e4939a2b65005f70cae1e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tobovunoberiki/2016_chevy_camaro_rs_manual.pdfIn PDF document text
    • https://91ca87c2-c493-4616-adaa-fbcec45394e1.filesusr.com/ugd/6116da_16bfc24cbb7b4befb9b48d27b6d21cbf.pdf?index=trueIn PDF document text
    • http://tivexedasabuxi.myartsonline.com/fesufilajuzekawimuladad.pdfIn PDF document text
    • https://ce2645ba-e89a-43d5-afff-5c0150757291.filesusr.com/ugd/c63dba_de189129cb714c34855c62da948cd20e.pdf?index=trueIn PDF document text
    • https://7f06b679-e14d-4525-8955-d56a7cf6f710.filesusr.com/ugd/79e5df_68580d7231a84880bd54fb25bd25e3b3.pdf?index=trueIn PDF document text
    • https://a804c8a8-fdf7-4fba-b19b-c23aecc29597.filesusr.com/ugd/a7074a_7ad2cb31ece64594a5ddd13159b31ae4.pdf?index=trueIn PDF document text
    • http://josuxak.atwebpages.com/why_is_my_brother_printer_error_light_flashing.pdfIn PDF document text
    • http://dafuwinev.myartsonline.com/33298533655.pdfIn PDF document text
    • https://s3.amazonaws.com/bufexa/60280980938.pdfIn PDF document text
    • https://s3.amazonaws.com/bamepofewalada/50419914358.pdfIn PDF document text
    • https://s3.amazonaws.com/gumagabu/40661268917.pdfIn PDF document text
    • http://zuputes.atwebpages.com/38282020847.pdfIn PDF document text
    • https://s3.amazonaws.com/bovenotojitowe/50393785503.pdfIn PDF document text
    • https://98cdd5c5-c43e-49eb-9373-39517e896cbb.filesusr.com/ugd/90661f_6a45ee82449b403ca3650e74d5b81463.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_off0000ec49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC49 5476 bytes
SHA-256: d8730bccedf93800ab62d9af19c1b49fd5eaba6d8e2a5a5d459eb7986683b894
font_01_sfnt_off0000fed7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFED7 10612 bytes
SHA-256: e699e30bbc8413ce44b491fea87d0a6695e1bd5fdbeba0a11e0dc61203a572bd

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