Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fb48a256ab5961d…

MALICIOUS

PDF

95.7 KB Created: 2021-03-13 20:10:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 04fb9bf0aaf14ef5b0cd5fd261bfe2c7 SHA-1: bb546dc5674fb42946ddc29971c772f879224f4d SHA-256: 8fb48a256ab5961d08befd0d9c854f8217b15c2b0a50a4fc9ea2b0fd94538858
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one prominent URL pointing to a website that appears to be part of a link farm or phishing operation. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or scamming by directing users to potentially harmful websites. No scripts were extracted, but the PDF structure and embedded links suggest an attempt to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • 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://dugedepap.ru/wix?keyword=army+jrotc+female+uniform+measurements PDF link annotation
    • https://cdn.sqhk.co/lesepivir/hcIAgjk/bosidorebagamoganibojomi.pdfIn PDF document text
    • http://canlisohbetim.net/apsara_assamese_movie_video_song0j8eo.pdfIn PDF document text
    • https://cdn.sqhk.co/dubutemaruxu/O1wHje7/riloseve.pdfIn PDF document text
    • http://iminn.ru/55496228676zxtr9.pdfIn PDF document text
    • http://nurokojo.mypressonline.com/why_are_crime_statistics_inaccurate.pdfIn PDF document text
    • http://productwood.ru/wafoguvhipdk.pdfIn PDF document text
    • http://zerkalo-fugicar.website/knowledge_based_interview_questions_and_answers7v470.pdfIn PDF document text
    • http://kigurumi.org/partition_magic_full_downloadncxw2.pdfIn PDF document text
    • http://luziniwanemek.sportsontheweb.net/what_can_a_kindle_fire_10_do.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://0c6b7a74-1ca0-41da-943c-c268a208a416.filesusr.com/ugd/fef373_7ca2770b6fa34fc8b1381761a8162b83.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vipuxafol/44732940100.pdfIn PDF document text
    • https://s3.amazonaws.com/tiduro/edexcel_a_level_chemistry_book_answers.pdfIn PDF document text
    • https://28f2c00a-638b-45ec-8848-4d649cb6aba9.filesusr.com/ugd/946f28_01e01d82b2cf46a9a5573282e2e25efc.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/genedonapubefe/76330725763.pdfIn PDF document text
    • https://s3.amazonaws.com/musokejixami/what_are_the_types_of_drawing.pdfIn PDF document text
    • https://s3.amazonaws.com/xufujofaleki/98214823984.pdfIn PDF document text
    • https://56f9ebfc-1b58-4ccd-90b9-24793863e956.filesusr.com/ugd/0f3536_fb516d868c70474dbfaa5aa6898d1062.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/popilo/bible_niv_free_offline.pdfIn PDF document text
    • https://s3.amazonaws.com/bisiku/38314539713.pdfIn PDF document text
    • https://s3.amazonaws.com/lemerisinivum/autocratic_leadership_style_advantages_and_disadvantages.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012ba1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BA1 5076 bytes
SHA-256: c09abf0b4e8c0ac21569096fa9cb4c335cace1403f60c8dc29e9dda19469ede0
font_01_sfnt_off00013cd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CD5 11168 bytes
SHA-256: abdfc422ad0ccbe132766e3cafe7807ea5ed4a4e6fa0c16535320629b314fdb2
font_02_sfnt_off00016313.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16313 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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