Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3caf866ad18107e…

MALICIOUS

PDF

72.7 KB Created: 2021-02-12 13:00:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 5b3379dcc5171fbe30b626acd77a8496 SHA-1: f5fb2d628a9de94a587f33ee1add8dcedd9d24d6 SHA-256: f3caf866ad18107e7431e0b11193b3c9953f5635c5c0c88571c24af2b9deec4e
154 Risk Score

Malware Insights

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

The PDF contains a link to 'crophysi.ru' disguised with a lure related to 'royal dansk danish butter cookies', a common tactic for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded malicious redirector link suggest it's designed to lead the user to a malicious site, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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=royal+dansk+danish+butter+cookies+24+oz In PDF document text
    • http://studyweb.site/zimopiziwataboteluvinia7f2.pdfIn PDF document text
    • http://christinaanddavid2019.com/domino_s_pizza_delivery_near_me_open_now87vb9.pdfIn PDF document text
    • https://cdn.sqhk.co/biluvetizom/tT8hbja/tinojubuzoraroxere.pdfIn PDF document text
    • http://info-pages.ru/em_que_capitulo_do_manga_de_kenichikft5q.pdfIn PDF document text
    • https://cdn.sqhk.co/vituxezij/f5VXlER/razejosamejixa.pdfIn PDF document text
    • http://circulshtangcalip.website/lie_nielsen_honing_guide_reviewaw81p.pdfIn PDF document text
    • http://vashastrahovka24.ru/dasetaguwm2dc.pdfIn PDF document text
    • http://makamar.xyz/leonardo_di_girolamo_sigalotti_diazdsecx.pdfIn PDF document text
    • http://vermono.site/space_shooter_galaxy_war_attacksc0vge.pdfIn PDF document text
    • http://bodatajusabobof.22web.org/triangle_interior_angles_worksheet_answer_key.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
    • http://bixoravu.epizy.com/videoder_hd_video_er_for_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/vutame/76994117054.pdfIn PDF document text
    • https://s3.amazonaws.com/padosumifubobo/generic_contest_rules_template.pdfIn PDF document text
    • https://s3.amazonaws.com/bulikowexunepov/another_word_for_not_unguided.pdfIn PDF document text
    • https://s3.amazonaws.com/gedimuta/large_format_camera_movements_explained.pdfIn PDF document text
    • http://rifoleb.epizy.com/45956808327.pdfIn PDF document text
    • http://kefasakawig.rf.gd/algebra_2_word_problem_practice_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/wozowuledij/55310926693.pdfIn PDF document text
    • https://s3.amazonaws.com/mejawiwomak/data_studio_templates_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/zazelujeju/jubib.pdfIn PDF document text
    • https://s3.amazonaws.com/tonemakopinibem/hilux_specification_sheet.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_off0000cdb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDB4 5492 bytes
SHA-256: eda48ac773120441039208674fe72a930a214a78a2a0a78f3280eb2b6056b716
font_01_sfnt_off0000e06b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE06B 11452 bytes
SHA-256: 61d58fbed6155360321942be47b0b255f9509a49ad0ec0e4010bfbd1ba8aaf8b
font_02_sfnt_off0001074a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1074A 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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