Malicious PDF — malware analysis report

Static analysis result for SHA-256 55e1e350c03e07d0…

MALICIOUS

PDF

77.8 KB Created: 2021-03-23 18:45:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 2147aa17507e82e9d9727e5677dff14e SHA-1: a8b0ee062f1343ac585610f6eabc43703f10022b SHA-256: 55e1e350c03e07d042bad7df57f455f287c7c976859de5aaa0efb01f823eff25
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document contains numerous embedded URLs, many of which point to disposable hosting or link farms, suggesting a phishing or malware distribution attempt. The presence of external URIs and the overall structure indicate it is likely designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://jumiwimov.ru/wix?keyword=how+to+burn+cd+from+itunes+on+windows PDF link annotation
    • https://cdn.sqhk.co/jusulikipe/JpBjgjg/old_telephone_ringtones.pdfIn PDF document text
    • http://fotogodopuxet.iblogger.org/assistant_lecturer_cv_template.pdfIn PDF document text
    • http://wapotod.22web.org/interior_angles_of_polygons_worksheet.pdfIn PDF document text
    • http://lishop.site/cb_background_images_hdh4wcf.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/CKsihKb/40504930244.pdfIn PDF document text
    • http://moscowflowers.shop/55410911481qvgp7.pdfIn PDF document text
    • http://divuwon.iblogger.org/27375255147.pdfIn PDF document text
    • http://lolafoduluj.22web.org/aashiqui_2_audio_songs.pdfIn PDF document text
    • https://cdn.sqhk.co/fejisedetu/j6zEjiI/christmas_grocery_shopping_list_printable.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://botusojulepeja.rf.gd/how_much_weight_can_a_2017_dodge_ram_1500_tow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/497c80c0-ee92-482f-8a98-16620a1f17ce/best_quantum_field_theory_books.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c6a3e24-637e-4edd-aac2-98527102999b/kavelomipodibivifun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/036bf3d1-a9a1-41af-bf97-a679b6fdaf7c/how_much_is_rock_band_4_for_ps4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4fbd4455-0762-4297-a04f-fed027b98ef2/what_is_an_example_of_a_marketing_plan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7aa2bf5e-fcaa-4e2f-a810-f411dd3fd563/sepawogowowuvudevamog.pdfIn PDF document text
    • https://s3.amazonaws.com/mivokozibu/imaginary_and_complex_numbers_practice_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/zafaronivaj/aaruthra_tamil_movie_tamilrockers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c39a1a0-ba56-4a00-b3b3-a4d99d73c72b/worlds_together_worlds_apart_companion_reader.pdfIn PDF document text
    • https://s3.amazonaws.com/dukexajuj/dugivomigu.pdfIn PDF document text
    • https://s3.amazonaws.com/luworizesupox/beretta_m9a3_9mm_holster.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16a69512-a364-47ba-a724-3174fd946135/hp_officejet_6500a_plus_printer_alignment_failed.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_off0000f43d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF43D 5120 bytes
SHA-256: 13f508b855368e1f2c06676fda2e34be64158077ce140fd899b2e589cf584588
font_01_sfnt_off000105a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105A2 10424 bytes
SHA-256: dd11afe2e45532b5ae3d76547d5dd923a85345dea50924ffa1be2254b864a074

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