Malicious PDF — malware analysis report

Static analysis result for SHA-256 d16155304222b491…

MALICIOUS

PDF

72.7 KB Created: 2021-05-09 21:56:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 187e4e4ed2ab6972ea7ac6567bc52a75 SHA-1: 79fcf50fe673d522291f6ba04cc728ad159e8276 SHA-256: d16155304222b49151c148846459bc801345fafaa80340cb0641b7bc4a454bd6
154 Risk Score

Malware Insights

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

The file is a PDF containing a malicious redirector link disguised as a free workout offer. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URL points to a known malicious redirector, likely intended to lead the user to a phishing or malware download site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://yafferge.ru/strik?utm_term=free+bodyboss+workout In PDF document text
    • https://cdn.sqhk.co/nefikelifu/jiPjdMc/aaron_donald_jersey_womens.pdfIn PDF document text
    • http://waparudadip.mywebcommunity.org/97176868821.pdfIn PDF document text
    • https://cdn.sqhk.co/pujixefan/Zhcoigy/welewobale.pdfIn PDF document text
    • https://cdn.sqhk.co/niserutom/xyjasfD/schylling_mini_rope_puzzle_solutions.pdfIn PDF document text
    • http://sekelenogake.getenjoyment.net/shamus_khan_privilege_summary.pdfIn PDF document text
    • http://farozemirig.scienceontheweb.net/rafokevarasal.pdfIn PDF document text
    • http://jawazapefaxuzit.mywebcommunity.org/cisco_2960_x_24_datasheet.pdfIn PDF document text
    • https://cdn.sqhk.co/vifejoneses/OuHiaij/subway_fun_runner_endless_runner.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e7ef20b-111b-4b71-aabf-68282de69a2f/how_to_use_a_breville_toaster_oven.pdfIn PDF document text
    • http://zitulogakapede.myartsonline.com/fozinepekupobewukuv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5ed5a5c-0aec-49fc-adf8-d0e1fd301a24/kemelugogufabisipevanase.pdfIn PDF document text
    • https://s3.amazonaws.com/xuvamuba/20137662682.pdfIn PDF document text
    • https://s3.amazonaws.com/dutimajizowa/forex_swing_trading_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44ea36f2-7938-4959-b69d-5234317f796f/petsafe_citronella_bark_collar_not_spraying.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7d6d584-0d00-4c7b-b5cc-ec97b313efde/bapumogibajesewugime.pdfIn PDF document text
    • https://s3.amazonaws.com/dewutexorob/skf_chevin_fonts.pdfIn PDF document text
    • https://s3.amazonaws.com/widuxade/how_much_does_lotus_car_cost.pdfIn PDF document text
    • https://s3.amazonaws.com/bevekizadoxuj/36405294756.pdfIn PDF document text
    • https://s3.amazonaws.com/bitajemisajoz/13530465654.pdfIn PDF document text
    • https://s3.amazonaws.com/dupula/sony_dslr_a300_specifications.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62a4b877-552b-43d2-978d-ee1565f03503/katzung_pharmacology_download.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_off0000e192.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE192 4928 bytes
SHA-256: f6b90b72a1a7a2e2e4f578428132278dcd8411e1bc8c066dd8ccd40316240e9f
font_01_sfnt_off0000f281.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF281 10340 bytes
SHA-256: 465ff3696666489acb8a60db321867cf7ecf41c9fc04527e845cd4c7d5cc85d9

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