Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7a323133006e199…

MALICIOUS

PDF

75.9 KB Created: 2021-02-21 14:10:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: bd36936f9ceaa9726d23120667b19a8b SHA-1: 2b9cb61fda31fdd54c766f65cbec045d33ed884d SHA-256: b7a323133006e1996fbcf146089802a08a9ee52c30c936671dbc90b87bfa38fb
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'crophysi.ru'. The ML classifier and ClamAV also flagged this PDF as malicious, specifically as a phishing trojan. While no scripts were extracted, the presence of a malicious URL within the document body, disguised as a movie trailer link, strongly suggests a phishing or malware distribution attempt.

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=the+stand+in+movie+drew+barrymore+trailer In PDF document text
    • https://cdn.sqhk.co/mapetidul/ejbsjd3/gift_cash_taxable.pdfIn PDF document text
    • https://cdn.sqhk.co/putuziboki/zdjecAD/smd_components_soldering_methods.pdfIn PDF document text
    • http://mon-cmb.best/38607687659yysip.pdfIn PDF document text
    • https://cdn.sqhk.co/zodavujera/slk0nhg/bee_craft_activities.pdfIn PDF document text
    • http://reznitskygallery.com/55919952891ck799.pdfIn PDF document text
    • http://dreabling.online/53735194218b1xjb.pdfIn PDF document text
    • http://prostotit.site/get_free_followers_for_instagram_apk6r4gr.pdfIn PDF document text
    • http://love-cosmetics.shop/metallurgy_multiple_choice_questions8ceg7.pdfIn PDF document text
    • https://cdn.sqhk.co/fifapupifig/vghlAjg/youth_basketball_training_program_near_me.pdfIn PDF document text
    • http://accface.in/mcdonald_s_breakfast_times_covidy1vqm.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368999/normal_5fe3db8085d19.pdfIn PDF document text
    • http://quickstore.pro/hallelujah_piano_sheet_beginner7222l.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/kozewuposoridil/free_template_slideshow_travel_tame_producciones.pdfIn PDF document text
    • https://s3.amazonaws.com/nefagolom/zelikipumotalelabavese.pdfIn PDF document text
    • https://s3.amazonaws.com/waxapoz/faxamatuxurasivadibogezuv.pdfIn PDF document text
    • https://s3.amazonaws.com/sonutopexaramuf/vocabulaire_anglais_des_affaires.pdfIn PDF document text
    • https://s3.amazonaws.com/jijari/40980912831.pdfIn PDF document text
    • https://s3.amazonaws.com/baxegezivumi/black_and_gold_wallpaper_for_android_free.pdfIn PDF document text
    • https://s3.amazonaws.com/geraromu/acute_surgical_abdomen.pdfIn PDF document text
    • https://s3.amazonaws.com/gavobawum/18245379018.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_off0000e8ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8EE 5408 bytes
SHA-256: 5e5f1bcf655e125972227ba4353266d41883f4ef1f2de5a03a5a3824b560c4b6
font_01_sfnt_off0000fb3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB3B 11624 bytes
SHA-256: 301ff05987228161be905347fd28e58ff889f5896f91481cb7b05eb72b6c0ff4

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