Malicious PDF — malware analysis report

Static analysis result for SHA-256 d41e36a8c1c8e2e2…

MALICIOUS

PDF

158.5 KB Created: 2021-04-03 03:05:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 3d784f6a0ee362b94076ac51441596af SHA-1: 5d86d996b2d65c536a0877aa1628dff96ae7800b SHA-256: d41e36a8c1c8e2e279b3c50198c285ab0d8f5449d024cb1fadbcd07d03d14540
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure, specifically `https://crophysi.ru/award?keyword=biblia+cronologica+pdf+gratis`. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of malicious links within the document body suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9962

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://crophysi.ru/award?keyword=biblia+cronologica+pdf+gratis In PDF document text
    • https://cdn.sqhk.co/vibisidumes/i2ifgQX/make_a_city_idle_tycoon_mod_apk.pdfIn PDF document text
    • http://kozovuxe.22web.org/ligalopawex.pdfIn PDF document text
    • http://kutatit.getenjoyment.net/86805413725.pdfIn PDF document text
    • https://cdn.sqhk.co/zowonefaso/ahaFOto/pokemon_go_plus_app_open.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372972/normal_5feafca10583d.pdfIn PDF document text
    • http://tafugegajotu.mygamesonline.org/quotes_from_the_adventures_of_huckleberry_finn_about_jim_with_page_numbers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450625/normal_6020182f8231a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484364/normal_6067872edc316.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378846/normal_5ff9426d65ef9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454547/normal_601061b9a56e7.pdfIn PDF document text
    • https://cdn.sqhk.co/naxaroja/fjcgeGn/lobekovobu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dotopaku.atwebpages.com/black_s_law_dictionary_online_free.pdfIn PDF document text
    • https://s3.amazonaws.com/gazitif/39763461588.pdfIn PDF document text
    • https://s3.amazonaws.com/tetenifeme/picture_brain_teasers_with_answers_ppt.pdfIn PDF document text
    • https://s3.amazonaws.com/nodetuxapabara/refomakadarekiv.pdfIn PDF document text
    • http://nadilafirot.rf.gd/banting_meal_plan_for_beginners.pdfIn PDF document text
    • https://s3.amazonaws.com/livivuvuwugeb/auto_clicker_for_android_5._1.pdfIn PDF document text
    • https://s3.amazonaws.com/petikamov/48146677016.pdfIn PDF document text
    • https://s3.amazonaws.com/befafuni/best_books_to_read_if_you_want_to_become_a_lawyer.pdfIn PDF document text
    • https://s3.amazonaws.com/sedimeraxufi/united_airlines_flight_attendant_career_information.pdfIn PDF document text
    • https://s3.amazonaws.com/mokixetat/balancing_chemical_equations_worksheet_with_answer_key.pdfIn PDF document text
    • http://vowupesagol.epizy.com/the_book_of_enoch_answers_in_genesis.pdfIn PDF document text
    • http://didaduxazej.epizy.com/how_to_improve_your_max_push_ups.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001ff6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FF6D 5512 bytes
SHA-256: f154de9b1f15be5fb7618d8c29541495f7ff51cc39c00f64c01a9e64339e0f3f
font_01_sfnt_off0002122f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2122F 1964 bytes
SHA-256: 409ee9a3885541ffdc58d6bd2d6bfd260a46de59e4270c8c7780dd2af6cdbafe
font_02_sfnt_off00021b88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21B88 13236 bytes
SHA-256: c633ffea6b0519f6922a40fa47b8fb8559141d31865f321019d825195365e68d
font_03_sfnt_off000247c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x247C0 20320 bytes
SHA-256: b92a2348a4742425759d04fada104069b57faecf7c375e19e55bd00d37fe3252

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