Malicious PDF — malware analysis report

Static analysis result for SHA-256 db2c911cc2fe18e6…

MALICIOUS

PDF

83.5 KB Created: 2021-03-19 09:39:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: d5d03f06b5b127ca3b52329a0d11b3b5 SHA-1: 2e8e0650a4bd09d40165276cd74ec597c9f3365c SHA-256: db2c911cc2fe18e6e8acc9a458d06d36b377052fdd2ce66d6d679683bcbccb06
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of embedded URLs, many pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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 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://vilenefex.ru/strik?utm_term=does+mami+have+an+accent PDF link annotation
    • http://winclean-shop.space/how_much_should_i_charge_for_designing_a_restaurant_menu0ijsd.pdfIn PDF document text
    • https://bafizotadax.weebly.com/uploads/1/3/4/7/134761596/4557837.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374857/normal_600ea10ff2490.pdfIn PDF document text
    • http://zelopaqq.xyz/total_gym_supra_pro_exercise_manualkawog.pdfIn PDF document text
    • https://garituba.weebly.com/uploads/1/3/4/3/134335889/4fbd6e0b4d.pdfIn PDF document text
    • https://fedebeforejasu.weebly.com/uploads/1/3/4/4/134498020/6001957.pdfIn PDF document text
    • https://paxupodef.weebly.com/uploads/1/3/4/7/134763896/sipufesoketexusodew.pdfIn PDF document text
    • http://fbdirect.site/394838656484r6hc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496826/normal_5fe67737f4120.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387815/normal_600a0025ade1a.pdfIn PDF document text
    • http://vilopeg.xyz/singer_touch_and_sew_7462_reviewsjrmm9.pdfIn PDF document text
    • https://jibukosixej.weebly.com/uploads/1/3/4/0/134018053/8336463.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4502833/normal_5fc802561db94.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418170/normal_5ff1ce95e10ff.pdfIn PDF document text
    • http://dirtygirl.fun/97104744665e0wgg.pdfIn PDF document text
    • http://zavarivaemvmeste.ru/56881395784i5fno.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e5841e3-2245-49e7-9ed2-31ac6ad6af67/29956347656.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c71bdeac-ce36-4443-8ab5-52d1aab3791a/48542986887.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e71b984a-d17b-4c12-aa74-d39cea2fefa1/kizugigi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f19436e-4535-4adf-a93c-c4a82e11e8f4/bodidinalotudawurak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6cc4e6f2-a3d9-43ff-ba9f-c0e916a99cb4/penevufofanagizej.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_off00010722.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10722 4972 bytes
SHA-256: 75abc0f3d3b35bdeebacb23290029f7d1946efe0dc26fa335a57b1b7f15496d8
font_01_sfnt_off000117f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117F1 12404 bytes
SHA-256: b058dd9c4b146e9a8cb7a099e15f3c646601b2b687f79f89ebd20f9d99523b9f

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