Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f12c5c2679cd225…

MALICIOUS

PDF

74.5 KB Created: 2021-01-24 13:59:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 07622d5037d104b9f0b254f456ecb7a3 SHA-1: ed07003c9d577e867fc3c040353e841fe2df1178 SHA-256: 5f12c5c2679cd225bcaeeb3f6c57c67ca10b1eb8fd1262f4baccc7c2908aeaf2
226 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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://leonvi.ru/aws?utm_term=apache+maven+3.+5.+0++for+windows PDF link annotation
    • https://sitapiwagese.weebly.com/uploads/1/3/0/8/130814355/gasigositanoveb.pdfIn PDF document text
    • http://kewisanoxiv.66ghz.com/63958299183.pdfIn PDF document text
    • https://cdn.sqhk.co/kepilujofeje/fhijfcV/yellowstone_season_3_cast_mia.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486060/normal_5fe112a9b93d3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489717/normal_5ff818607dccf.pdfIn PDF document text
    • https://cdn.sqhk.co/bidelefo/ejwmohe/28491164061.pdfIn PDF document text
    • https://cdn.sqhk.co/tomubozes/dhgS1hj/kabetidojovumajizuje.pdfIn PDF document text
    • http://patewukezevo.iblogger.org/physics_laboratory_equipment.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390381/normal_5fd233f215eaa.pdfIn PDF document text
    • https://cdn.sqhk.co/sezibagigi/jbtgdij/ice_dragon_quest_botw.pdfIn PDF document text
    • https://lumigoxodavi.weebly.com/uploads/1/3/1/6/131606620/3149829.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462341/normal_5ff85655d4c99.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tilixufevoj.epizy.com/deforestation_causes_and_consequences.pdfIn PDF document text
    • http://xevikosurozogin.rf.gd/afcat_2_2018_syllabus.pdfIn PDF document text
    • https://s3.amazonaws.com/kefodek/christmas_font_word.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_off0000dd6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD6D 5964 bytes
SHA-256: 838a32347dfd3565aa86a2b7dcb7bce27e7851490d35248821f1db77c2612f88
font_01_sfnt_off0000f1b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1B6 12724 bytes
SHA-256: 2ae8382a172404884416f2eafe2f6100eda6e249148753ed7a905ce9a41b81ef

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