Malicious PDF — malware analysis report

Static analysis result for SHA-256 434d58ae1e573d7f…

MALICIOUS

PDF

80.1 KB Created: 2021-03-14 22:36:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6283a955d144b7d4337b3cdc66735484 SHA-1: defacff95659a5cf5ddb63b9f0d11bda3ad334b0 SHA-256: 434d58ae1e573d7f3143d0575bba7f1e6b2c7916b6d6704fe036b4a1bad41b3b
156 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, with one specifically titled 'how to share a video on messenger', suggesting a social engineering lure. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external links point towards a malicious campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://zajinet.ru/strik?utm_term=how+to+share+a+video+on+messenger
    • https://cdn-cms.f-static.net/uploads/4486346/normal_60305f8fe42a5.pdf
    • http://mopowataxix.medianewsonline.com/fulova.pdf
    • https://cdn.sqhk.co/sobekalob/5ujdPje/tiny_army_online_play.pdf
    • https://cdn.sqhk.co/wimiwupo/Rjjkhia/66296561556.pdf
    • http://naliputa.mywebcommunity.org/tisumeguwaf.pdf
    • http://veselutut.mywebcommunity.org/kexabezedejusakaxib.pdf
    • https://cdn.sqhk.co/sigidezok/hgvI2sC/pacify_her_slowed_down.pdf
    • http://vipogomer.iblogger.org/caballo_de_troya_gratis_libro.pdf
    • https://static.s123-cdn-static.com/uploads/4449602/normal_5fdda57590bf7.pdf
    • http://gixipures.sportsontheweb.net/anger_management_books.pdf
    • https://cdn.sqhk.co/bupedamarib/gdia8ij/64903191314.pdf
    • http://larediwavokib.iblogger.org/katazodukaso.pdf
    • https://cdn-cms.f-static.net/uploads/4469841/normal_601727935fa87.pdf
    • https://cdn-cms.f-static.net/uploads/4463287/normal_5fe80b6808bf0.pdf
    • https://cdn-cms.f-static.net/uploads/4470385/normal_601dda5540c07.pdf
    • https://cdn.sqhk.co/fovuxugo/hghichd/gegur.pdf
    • http://tetizeniwa.mypressonline.com/pokevimabakod.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://a1bd7baf-2de3-4c81-8914-4b74a732ecf9.filesusr.com/ugd/c89f15_d2aafc5cc0f5479cbb974fe2e5c1d378.pdf?index=true
    • https://2a6c20f5-091f-48b5-a5be-bf749919b1f6.filesusr.com/ugd/3794ad_d248ac4a107e481caa8fffbbaa82ad26.pdf?index=true
    • http://roxujewov.myartsonline.com/apache_web_server_book.pdf
    • http://limufij.myartsonline.com/73630219114.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edb1.bin
ddc87ac98a2c084e9fb695a683ab1645bb8c060670c4b03080a51d3bf017ebab		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEDB1 5108 bytes
font_01_sfnt_off0000feee.bin
365831f612f8e584420d765f4d65eb2bf44eded7c92c3fe861a19b1d59254643		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFEEE 11296 bytes
font_02_sfnt_off000124db.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x124DB 4324 bytes

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