Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cd29ca9d7262e0c…

MALICIOUS

PDF

76.7 KB Created: 2021-04-12 21:32:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 18e9b83d8c30d6115aad4c831d5cbb26 SHA-1: 0d7b54b3a91e5a6d44174fb71fd6352b9a557727 SHA-256: 7cd29ca9d7262e0c8da6649817347a69ccc9cb12d381a6371aa3cd66c8d3776f
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-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://golowaki.ru/strik?utm_term=how+to+sync+leggett+and+platt+remote PDF link annotation
    • https://cdn.sqhk.co/lolumebitana/7kighij/capacitors_in_ac_circuits.pdfIn PDF document text
    • http://bebinovixox.iblogger.org/logical_reasoning_test_papers.pdfIn PDF document text
    • https://cdn.sqhk.co/livixugakuf/0ErmhcV/2803330766.pdfIn PDF document text
    • https://cdn.sqhk.co/tokebamojos/jhfibhf/zejarefufurag.pdfIn PDF document text
    • https://cdn.sqhk.co/fumamimed/rijbhdP/pibidozakawelis.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fitariruzazu.epizy.com/minuet_in_g_minor_bach.pdfIn PDF document text
    • https://171e2b11-24ea-4535-acac-f971ec821c4b.filesusr.com/ugd/a07927_928a0df32a06448e847edd27ef709071.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/14f4b93b-3267-4229-ad20-eb511af10f9f/bonoxoxigenevenido.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5af9d922-b881-4bb3-96a2-00f46f6fb8c1/bodyweight_workout_without_equipment_reddit.pdfIn PDF document text
    • https://e1cd7dcf-8988-4be8-9b1a-722367337987.filesusr.com/ugd/6203b9_f8d8cbda45e942688be0784f88173b84.pdf?index=trueIn PDF document text
    • https://ede8a7a3-2377-4e09-926a-401222b31c25.filesusr.com/ugd/81c89d_655644899c3249d797fc91abf051f331.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/10e07c10-6375-4ddf-9c50-37a14d742df0/nilutanixuxomarojawefija.pdfIn PDF document text
    • https://ff9dba89-6132-4485-99c2-ace8a2453124.filesusr.com/ugd/c3f59f_a470db70bfb141afa68f48aafb4138eb.pdf?index=trueIn PDF document text
    • http://xorabaza.rf.gd/zalezebozoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d083ae3-7496-4878-bbdb-548f7b40fef7/fodogosasemufevi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8da061a-da11-46d6-a8a3-82387250f6b8/kung_fu_hustle_movie_online_free_english.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29220751-428c-4448-b1ab-94c56771212c/nawagimodorepogox.pdfIn PDF document text
    • http://xoxinazur.rf.gd/35483763513.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3e5faae-7e88-48aa-95dd-f886a4986252/books_like_king_of_thorns.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_off0000e886.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE886 5548 bytes
SHA-256: e406f7ada45febb9ca4cef632c3ee2473844dc4703004e8b8dd7639af2e7765a
font_01_sfnt_off0000fb6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB6C 12200 bytes
SHA-256: a923d4e7a50592443f3caeacc74c72e07731d82a5a1084b0c792d4934edf3469

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