Malicious PDF — malware analysis report

Static analysis result for SHA-256 0846da8e9ace954e…

MALICIOUS

PDF

77.7 KB Created: 2021-04-09 19:59:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 9e8912b2a91619f964ff753dbed75d20 SHA-1: b41665e0f48f7f423c6af107f795c798ca4678fc SHA-256: 0846da8e9ace954e4db6cfde558a9c4b33be9bafbfed695e899ca531c25ef403
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://jumiwimov.ru/strik?utm_term=2015+printable+calendar+with+holidays PDF link annotation
    • https://cdn.sqhk.co/pisomuma/jdhahhZ/water_bottle_flip_vine_job_interview.pdfIn PDF document text
    • https://cdn.sqhk.co/sejejajoxej/Stgehci/tripp_trapp_newborn_set_harness.pdfIn PDF document text
    • https://cdn.sqhk.co/dubezaxuviz/ji0ibji/48795989597.pdfIn PDF document text
    • https://cdn.sqhk.co/degavorofala/J6gdtC9/sogaf.pdfIn PDF document text
    • http://towexiwi.sportsontheweb.net/16891667968.pdfIn PDF document text
    • https://cdn.sqhk.co/dojopaxitovi/chhicGF/74805223081.pdfIn PDF document text
    • https://cdn.sqhk.co/bupedamarib/ghjgigE/best_free_antivirus_malware_for_android.pdfIn PDF document text
    • https://cdn.sqhk.co/tunidenopu/iSii6Zl/lirugudezekezulezelonaw.pdfIn PDF document text
    • https://cdn.sqhk.co/nebinefis/Ba7Igcz/boxotu.pdfIn PDF document text
    • https://cdn.sqhk.co/vizebika/Qhjotp6/share_market_trading_classes_in_mumbai.pdfIn PDF document text
    • https://cdn.sqhk.co/fuzomorikat/X7ih56d/dajozamakepetetotal.pdfIn PDF document text
    • http://farunoraxukiz.getenjoyment.net/astm_e83_free_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rotufixijisadi.onlinewebshop.net/22034703975.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/502ea859-6288-44e9-ad12-64c5dc1606af/jomedoki.pdfIn PDF document text
    • https://3568ea06-17fa-4787-91ae-86b9aa918cbd.filesusr.com/ugd/8ade13_efb5108bdea14fc7bba36603b0b78daf.pdf?index=trueIn PDF document text
    • http://lojabupabavize.onlinewebshop.net/be_going_to_exercises_2_eso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a170751d-e01d-4c4a-8ac1-5bc01e50c432/gone_with_the_wind_sequel_1991.pdfIn PDF document text
    • https://6ddb26ad-aa8e-4a3e-a925-5cef6fc035e1.filesusr.com/ugd/d3d820_bc6c2bdaaba04ef6843d75232bec7ef9.pdf?index=trueIn PDF document text
    • http://luvepel.myartsonline.com/baxetilov.pdfIn PDF document text
    • https://7980b0ff-2efe-48f4-a442-6c87bca80713.filesusr.com/ugd/9bd8c3_467bc0aa9f0d4725a4b0192f71345d65.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_off0000ee5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE5A 5852 bytes
SHA-256: 4807a06967f62945d5b57dd458dba29425291be0a930cc0e7679e00979d5dc32
font_01_sfnt_off0001024b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1024B 11544 bytes
SHA-256: 5de73f86f40db191d0337f4d3d563a38f870105dc0d8f224c3700c1ee88b866c

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