Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0a44f388e6e1dc9…

MALICIOUS

PDF

83.9 KB Created: 2021-05-31 12:50:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: fbb2595f0299f5aa62dca4da7ca05bc8 SHA-1: fead7f4363d18095fe1f3843e87b6d142ed3f28c SHA-256: f0a44f388e6e1dc94817fd1af7e76bf262325019ed80dcc5741aa7be36a1ac5d
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier, and is detected by ClamAV as Pdf.Phishing.Trojan. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The embedded URLs point to domains that are likely used to host malicious content or redirect to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://mezovuduw.ru/strik?utm_term=which+is+the+best+bhagavad+gita+book+in+hindi PDF link annotation
    • https://vipeketiduwe.weebly.com/uploads/1/3/1/6/131636725/kuwubej.pdfIn PDF document text
    • https://vogemafebin.weebly.com/uploads/1/3/4/2/134235603/1208461.pdfIn PDF document text
    • https://vuwurata.weebly.com/uploads/1/3/4/4/134481670/jupat.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484818/normal_5fe0614173c1d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383566/normal_606a34ee466a5.pdfIn PDF document text
    • https://wiwetone.weebly.com/uploads/1/3/4/6/134660192/puzarazumisidemilaju.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382412/normal_601f2cb315d54.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501374/normal_606b974daaa6b.pdfIn PDF document text
    • https://tutitobogin.weebly.com/uploads/1/3/4/4/134485970/534b3b306d7a1.pdfIn PDF document text
    • https://lijiwowotu.weebly.com/uploads/1/3/4/5/134587055/69b0d36.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490001/normal_5fe3ff7e52a9d.pdfIn PDF document text
    • https://famipitep.weebly.com/uploads/1/3/4/3/134355151/7a8cd9fd36d4.pdfIn PDF document text
    • https://sikukaposarimi.weebly.com/uploads/1/3/5/3/135307882/9ac264.pdfIn PDF document text
    • https://fejegexe.weebly.com/uploads/1/3/4/6/134617501/xakeboxuxomis.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://uploads.strikinglycdn.com/files/44fea9b4-5d6d-438a-bbbd-c4f25ff7083e/loruzevozitixedo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aae81208-9d16-4266-968d-6b92977df9c2/garmin_nuvi_50_free_lifetime_maps.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/109d8070-bd21-40dc-b8fa-c0069aa1ec44/6528694970.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d154185-70bb-4b30-becd-ea50cf56cf4d/why_my_kenmore_dryer_wont_start.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34ad3b19-5216-4547-bc13-10230343b320/dosukap.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e358.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE358 5348 bytes
SHA-256: 1f5e4ab044d8c66ac68a5172324ac6ad3573675db16aa2fb1a4b36f9303c745f
font_01_sfnt_off0000f59e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF59E 11696 bytes
SHA-256: 35d861063d1656bdeac6003fc993ca17eb81b1d724837aeaf1928d097ca67a88
font_02_sfnt_off00011bf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BF2 16304 bytes
SHA-256: c90356f1b0c844d38a446c0d37f296145f7ba9856696c2d623aa32fceb1e6b99
font_03_sfnt_off000131e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131E8 3416 bytes
SHA-256: c63594c59b2dd7c8cc2e6da3a9a4c360a5f821d4d4deca3b581a70d78489d8f2