Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd908e6bdfc060d9…

MALICIOUS

PDF

77.2 KB Created: 2021-03-16 03:16:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: efc2728aa1bb7f4071180615143f30d6 SHA-1: 504b9e07443addec34265f41fb232b2ca0ac3178 SHA-256: fd908e6bdfc060d9746ebdca037fba0e78f8f3cb3830b19afcd55dd720fd9815
156 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of a phishing or malware distribution lure. It contains a large number of external links, many pointing to PDF files hosted on various platforms, suggesting a link farm designed to obscure the true malicious intent. The primary URL, 'https://druttle.ru/wix?keyword=fake+gps+spoofer+pro+apk+free+download', indicates a lure for potentially unwanted software. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://druttle.ru/wix?keyword=fake+gps+spoofer+pro+apk+free+download
    • https://cdn.sqhk.co/loberutebe/9kdheie/world_sporting_events_august_2019.pdf
    • https://nododekevage.weebly.com/uploads/1/3/4/7/134733794/a1fbd63660cb99.pdf
    • https://jesipawuba.weebly.com/uploads/1/3/0/8/130874316/2004191.pdf
    • https://cdn.sqhk.co/dimumaneda/jcFdieE/ultimate_car_driving_simulator_gameplay.pdf
    • http://hermidkovo.info/hp_lj_p1606dn_tonero6i55.pdf
    • http://gvidilon.ru/bird_s_beak_crossword_answeru30gj.pdf
    • https://cdn.sqhk.co/sobutexe/hdih0CI/cute_cartoon_wallpaper_hd_for_iphone.pdf
    • https://roxilegetewus.weebly.com/uploads/1/3/4/7/134721251/ninobakuwel.pdf
    • https://jikodidujur.weebly.com/uploads/1/3/5/3/135319234/fajaxodewonakud-mebade.pdf
    • https://cdn.sqhk.co/fazologim/HoVgihd/jawuribul.pdf
    • https://cdn.sqhk.co/kupovite/hhhj2Sv/saddleback_basic_english_grammar_2.pdf
    • http://goproonly.com/do_you_have_to_be_licensed_to_do_lash_extensions_in_michigan1iw81.pdf
    • http://dreamingdeveloper.com/what_is_my_ip_address_gateway_and_subnet_maskdd8md.pdf
    • https://cdn.sqhk.co/zizenozi/igggDhg/vobutu.pdf
    • https://cdn.sqhk.co/wubunepan/ijidZhg/domuwofiximuki.pdf
    • https://cdn.sqhk.co/xawefigi/Mjaf9ge/24938147035.pdf
    • https://dubezotamepaloj.weebly.com/uploads/1/3/5/2/135297843/tekoda.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/bd6f465a-77ee-44d1-a55f-8aeaeb9a5194/how_to_use_photoshop_for_beginners_step_by_step.pdf
    • https://uploads.strikinglycdn.com/files/16d477b6-7023-4c10-b4d0-19813a28d375/96191633497.pdf
    • https://uploads.strikinglycdn.com/files/e7ecc187-9641-497d-9d73-34984d698400/taurus_pt111_g2_slide_release_problems.pdf
    • https://14535e1a-360a-4d01-a655-fa33e115c80e.filesusr.com/ugd/b222ea_32be57ae0f3741cea083f7f870bd0c00.pdf?index=true
    • https://2a4b29e6-a790-453e-81e7-e8b9caf2c27b.filesusr.com/ugd/bf0735_1c0ccdededea40bf9e4f9b9a3b4ed772.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef7f.bin
2e91491f33c5fa30e7e75e50ee0ee500acf36e834f5fbd9e85dc20516819a81e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF7F 5320 bytes
font_01_sfnt_off000101c6.bin
7dd1e3a1cc6c189ee3973db46f1e65629e8d355b71afdde6f5a17b3574ff25df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x101C6 11156 bytes

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