Malicious PDF — malware analysis report

Static analysis result for SHA-256 04cf7ff4726619d4…

MALICIOUS

PDF

72.3 KB Created: 2021-03-28 02:46:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 7dd858fca49b64b3f59bddb742fe7ea2 SHA-1: 68ea3fc29bf72d633feb51a7cb5c3167063d868a SHA-256: 04cf7ff4726619d48a3889ca6d7ad376b06cbd6ce927b25ba4bf2777c512a135
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were extracted, the presence of a malicious URL and the overall detection profile point to a phishing lure disguised as a technical document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://crophysi.ru/123?utm_term=technical+analysis+forex+strategy+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4404755/normal_604160e6dcd18.pdfIn PDF document text
    • https://cdn.sqhk.co/norejasiwiza/gjadPzr/visuwexegeterebafoxa.pdfIn PDF document text
    • https://cdn.sqhk.co/zapiseniw/jFak1V3/sportage_extreme_offroad_drive_modern_sports_cards.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444374/normal_60351a208099e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408187/normal_600294ff0deb0.pdfIn PDF document text
    • https://salexutoxor.weebly.com/uploads/1/3/4/7/134761189/9118804.pdfIn PDF document text
    • https://zisamezasebav.weebly.com/uploads/1/3/3/9/133997726/vabuviwibuwobemilul.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452386/normal_604ddaab2eaa2.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/c21db1ee-15d5-49bc-addf-16e0133f6ddc/functional_anatomy_of_yoga_david_keil_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubifirigevi/fluval_fx6_impeller.pdfIn PDF document text
    • https://s3.amazonaws.com/xeroguru/how_to_replace_a_washing_machine_waste_pipe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03027dae-5f5b-4b5c-b540-fd27996e614b/guwufezunosozepibevisujig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a91c192-cf0d-457d-9aec-faf1c3cc34ae/53243078198.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bda47ff5-d4d3-4ca2-a756-7809577bd4d0/soluciones_molares_formula.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6b5929a-478a-4b84-bcc9-acea7590d540/71348322750.pdfIn PDF document text
    • https://s3.amazonaws.com/kozibowisenatu/server_minecraft_1._5_2_jar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e44c7fa-1696-4173-8dbd-a56f2b4e0cc3/tippmann_98_custom_paintball_gun_value.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cec489ca-ef7d-4682-9a24-40d5bfc7316b/the_main_goals_of_psychology_are_to_quizlet.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_off0000dd27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD27 5536 bytes
SHA-256: 8acbb3e34cd8252fb19cf09145a55fcede0b16b7587285dcf7dfc6224bf5ae67
font_01_sfnt_off0000f008.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF008 10508 bytes
SHA-256: 68047cc9e95547014321285fb07cb17b91474d443c19d44b1d66bd85831e051d

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