Malicious PDF — malware analysis report

Static analysis result for SHA-256 fde42282818ed8cb…

MALICIOUS

PDF

72.8 KB Created: 2021-06-04 22:17:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 68d5466049db71dd63c80d5ec97513de SHA-1: da835639ae2815ac553b2f688e872d970c93f22a SHA-256: fde42282818ed8cb837f2d29c5929e863ef91dd87baf505349e3618e80660d68
186 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9998

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://huntic.ru/pbw?utm_term=omlet+arcade+mod+apk+revdl PDF link annotation
    • https://mabaxezo.weebly.com/uploads/1/3/4/7/134766945/09b14d77c.pdfIn PDF document text
    • https://zanelonovubut.weebly.com/uploads/1/3/4/3/134315015/xipojilamupofajaware.pdfIn PDF document text
    • https://zosetujisux.weebly.com/uploads/1/3/4/2/134266291/ruwilinixirikifoba.pdfIn PDF document text
    • https://lakukuvirukum.weebly.com/uploads/1/3/0/8/130874631/roneporerop_gapebisidad_mibavazurazi.pdfIn PDF document text
    • https://gojenegitoz.weebly.com/uploads/1/3/4/3/134387591/luvezo_lotekexudodet_zuxutenolifol.pdfIn PDF document text
    • https://zadejafiton.weebly.com/uploads/1/3/0/8/130813032/8707908.pdfIn PDF document text
    • https://xafokevixutevib.weebly.com/uploads/1/3/2/6/132681308/96d9e6.pdfIn PDF document text
    • https://ladunibik.weebly.com/uploads/1/3/4/0/134096621/laxosimazigegi-lumedemubu-fedaperatepivep-fixibukujun.pdfIn PDF document text
    • https://bijifejutumaxob.weebly.com/uploads/1/3/1/3/131381781/vugoxixivasal.pdfIn PDF document text
    • https://japapetokanov.weebly.com/uploads/1/3/1/4/131454126/wenof.pdfIn PDF document text
    • https://komimuvupelogi.weebly.com/uploads/1/3/4/3/134312664/vitulirirewobafob.pdfIn PDF document text
    • https://konoxitewe.weebly.com/uploads/1/3/4/4/134494736/8967103.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385207/normal_5fffaced836a3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501201/normal_603434118a701.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jesababa.pbworks.com/f/kadoxukarewogufik.pdfIn PDF document text
    • http://sazupamufode.pbworks.com/f/85955184174.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf96534a-47d5-44d2-b4ac-9f24bbf49ad5/etica_para_amador_capitulo_7.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2a4cd26-1463-4eea-9ddc-d9b8515e89dc/90169944375.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9732292e-738e-4c9b-9d50-58d95d889306/dezibubexejegugim.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2E9 5192 bytes
SHA-256: 99045b32a32522e153bb7a80e972b3957724541a4e327f8eda3813cbbfe7b0a0
font_01_sfnt_off0000f47b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF47B 9884 bytes
SHA-256: 3991f5f349c26aaeb90d07cf074bd655383ac70b46308d78787382b4fb5690f5

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