Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1f6b8a497ea5a36…

MALICIOUS

PDF

80.5 KB Created: 2021-03-02 21:20:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 96cb1c822dc0c792e218f30ac1cfff1b SHA-1: 5abd73b5e6b954b2825333e2243979f66ef0be7f SHA-256: f1f6b8a497ea5a368ff8ed364d92b9ae25f7402b8b5cff9a9aafb0b9deea3d3e
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though partially obfuscated, suggests a lure related to 'functional family therapy model', which is likely a pretext to encourage users to visit the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://pelibifir.ru/strik?utm_term=what+is+functional+family+therapy+model PDF link annotation
    • http://tezijexipilimo.getenjoyment.net/what_is_the_4th_maze_runner_book_about.pdfIn PDF document text
    • http://dududuw.mypressonline.com/stihl_blower_bg86c_parts_list.pdfIn PDF document text
    • http://forovasax.medianewsonline.com/vewiz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384472/normal_5fddbc52194e8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vojapu/zonerogitanogibuvuzunafoj.pdfIn PDF document text
    • https://s3.amazonaws.com/lodazojamuva/facebook_code_generator_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/tixeligufokup/cisco_switch_sg350x_datasheet.pdfIn PDF document text
    • http://situwosase.myartsonline.com/gapuze.pdfIn PDF document text
    • https://s3.amazonaws.com/xokebore/fawopazosowafuni.pdfIn PDF document text
    • https://s3.amazonaws.com/dusubonifu/autocad_2013_free_softonic.pdfIn PDF document text
    • https://s3.amazonaws.com/leributafa/angular_form_reset_dirty.pdfIn PDF document text
    • https://s3.amazonaws.com/purawuma/40880482437.pdfIn PDF document text
    • https://s3.amazonaws.com/pokorevalaxex/66367935557.pdfIn PDF document text
    • http://murawarex.rf.gd/38750633515.pdfIn PDF document text
    • https://s3.amazonaws.com/befarekogol/drawable_animation_in_android.pdfIn PDF document text
    • http://neropalumej.rf.gd/fokijajeme.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_off0000fe51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE51 5508 bytes
SHA-256: 4f1c1f7891dbb0314920e987d967e3848efd120ce17541fa891b5ba1204d7ede
font_01_sfnt_off000110f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110F6 10520 bytes
SHA-256: f19a7d86a70e02cb57254685e261b03a0fa1d9ecdfbed28773b34159fd89e6fc

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