Malicious PDF — malware analysis report

Static analysis result for SHA-256 1235cf6e04f1a4fd…

MALICIOUS

PDF

74.1 KB Created: 2021-05-06 06:57:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 0499992f5740d7c3cc34ef2cecfced2f SHA-1: 724b333e83517fe60d706e68f625f78804e0b6a5 SHA-256: 1235cf6e04f1a4fd52449c2f9ea77cd52c5b8a00737da750678c7a994dfa1463
184 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, and contains numerous links to potentially malicious redirectors. The document body, though obfuscated, suggests a lure related to movie scripts, likely to trick users into clicking the embedded links. The primary malicious URL identified is https://crophysi.ru/wb?keyword=300%20full%20movie%20script%20copy%20and%20paste, which is flagged as a redirector to known malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • 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.
  • 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.
  • 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/wb?keyword=300%20full%20movie%20script%20copy%20and%20paste In PDF document text
    • http://mavpa.fun/zogerevolepijolukjssoj.pdfIn PDF document text
    • https://cdn.sqhk.co/timadupak/gDrb25d/simple_cake_decorating_ideas_with_icing.pdfIn PDF document text
    • http://igme.site/organic_chemistry_as_a_second_language_freeefme0.pdfIn PDF document text
    • https://cdn.sqhk.co/nugilatunu/djagjjh/nezudidumoxujotiruka.pdfIn PDF document text
    • https://cdn.sqhk.co/foradimotiri/6iajeeV/spaceflight_simulator_full_version_mod_apk_android_1.pdfIn PDF document text
    • http://kevesojesofun.22web.org/arris_dcx3200_m.pdfIn PDF document text
    • https://cdn.sqhk.co/juzogimuju/gdygcha/vekaguba.pdfIn PDF document text
    • http://centerverifybadge.com/fematamotimaletareweklgac.pdfIn PDF document text
    • http://remont-kvartir-otzyvy.moscow/aplikasi_bobol_wifi_id_apkcpxi1.pdfIn PDF document text
    • https://sotokogel.weebly.com/uploads/1/3/4/2/134266154/e9e69ee4d7eead.pdfIn PDF document text
    • https://vunafenivanisip.weebly.com/uploads/1/3/5/3/135303543/kijodi.pdfIn PDF document text
    • https://netulomite.weebly.com/uploads/1/3/2/8/132814473/bikoxinanaxage_pobovotapaxiked.pdfIn PDF document text
    • https://cdn.sqhk.co/sujubowip/oahagjL/fovazovebesadulikodu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rubaporejolo.rf.gd/garmin_city_navigator_thailand_2018._20.pdfIn PDF document text
    • http://fasudum.rf.gd/83910025215.pdfIn PDF document text
    • https://s3.amazonaws.com/sefiwegegagu/66736151058.pdfIn PDF document text
    • https://7292b199-6d7c-4e84-b646-7854114497ba.filesusr.com/ugd/53361e_5a453ce7f39f445685370dc34a5173fd.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jiwotarotavuz/blue_is_the_warmest_color_watch.pdfIn PDF document text
    • http://mibavipef.epizy.com/rob_dougan_clubbed_to_death_piano_tutorial.pdfIn PDF document text
    • https://s3.amazonaws.com/waxapoz/bluetooth_device_for_windows_8_free.pdfIn PDF document text
    • https://s3.amazonaws.com/vabemavuputenif/free_vpn_for_android_apk.pdfIn PDF document text
    • http://rulekozerojukez.rf.gd/biology_101_study_guide.pdfIn PDF document text
    • https://f62823ea-e863-4eb7-bd7c-e3bac0139ff1.filesusr.com/ugd/8c639a_aad96dcf2d1b46f7a72c6a2339217451.pdf?index=trueIn PDF document text
    • https://4d75d3c9-3a4d-4df6-84ab-e48b83d723e5.filesusr.com/ugd/cdb50c_b4b9c762c3ad46ccb38b39b33a382ba3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jivagajamav/blockbuster_allu_arjun_song_free.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_off0000e290.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE290 5676 bytes
SHA-256: cbcbb090d4be273304d9ba6bc8789076cb539c5a178052e4d088069a8fd9b0f4
font_01_sfnt_off0000f5d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5D6 10888 bytes
SHA-256: 141f46ebe186c2ec36452a54b43c8b161e663687d23f8779f4296cd626d53855