Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fe38e7082cc0b9b…

MALICIOUS

PDF

83.9 KB Created: 2021-03-13 17:14:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: c42a368b399ca82c2cca501cc4b0cf06 SHA-1: 3005e2bac6b333bc06dcfc5b330de5e39e5b6e20 SHA-256: 7fe38e7082cc0b9bd1792cc35b722ea495cfce5b30d98c31d74f39d7b1880c0b
224 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF contains a malicious redirector link disguised as a download for 'Uc browser apk free download for android 2.3.6'. This lure is designed to trick users into installing potentially malicious software or browser extensions. The presence of multiple links to disposable hosting and a known malicious redirector strongly indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://yafferge.ru/wix?keyword=uc+browser+apk+free+download+for+android+2.3.6 In PDF document text
    • http://mobile-media.moscow/7634835697krqii.pdfIn PDF document text
    • http://siankaanmexico.com/subexanotimajiw34.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366034/normal_5ffb98d248ae4.pdfIn PDF document text
    • http://jozipuvuwuzaj.mywebcommunity.org/cambiar_de_a_word_gratis_en_espaol.pdfIn PDF document text
    • http://zememor.sportsontheweb.net/what_is_a_ul_certification_mark.pdfIn PDF document text
    • http://vosajizegek.mypressonline.com/cuanto_es_8_centimetros_en_milimetros.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377928/normal_5fcf4486c988c.pdfIn PDF document text
    • http://pixxel.life/definite_and_indefinite_articles_exercises_with_answersw39xu.pdfIn PDF document text
    • http://zabovawupe.mypressonline.com/echo_srm_210_carburetor.pdfIn PDF document text
    • http://rilomenininun.getenjoyment.net/how_do_i_update_my_samsung_j5_software.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368751/normal_601715cc52554.pdfIn PDF document text
    • http://bebetadiruj.mywebcommunity.org/24642344807.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374368/normal_6020aec53d08c.pdfIn PDF document text
    • http://digtalcaliper09.xyz/2610621581189mey.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/214b517c-266b-48ff-bdad-0fef8ad56ee3/newiwowif.pdfIn PDF document text
    • https://3ea853e4-7f2b-4fb0-9229-b04907a1e321.filesusr.com/ugd/d94095_8c3a286b1c3440a49ae47f15f7a23ac6.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b86f0ec4-3c30-4b93-aa07-ac3b54b6c408/samsung_65-inch_q7_4k_uhd_qled_smart_tv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d6fd63f-c711-411a-a9bb-77ae9f8485ac/pilot_english_grammar_10th_class_download.pdfIn PDF document text
    • https://b8436764-02b3-4471-8711-1e8fed235cf0.filesusr.com/ugd/3b3fbb_bb6d285faaac44fa85c666fbd75d86c4.pdf?index=trueIn PDF document text
    • http://gafodix.myartsonline.com/rudawubaf.pdfIn PDF document text
    • https://b23183eb-b2e5-455e-bc25-91fac1efd10f.filesusr.com/ugd/cc14e4_80c5c7b788604d73992b7eee62fdec8f.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1FE 5916 bytes
SHA-256: 939950ac9c17080c8cfd3cc5f62596dca1389b1cb09275a822431128428284a5
font_01_sfnt_off00010645.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10645 11296 bytes
SHA-256: 8f93bea6efed3464c3cf000da96475f7b3ed3e811dc6d515dde46bb41d2e164b
font_02_sfnt_off00012cc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CC4 16092 bytes
SHA-256: c9557d91917e40dbb2ce09b7ef560a04a9a832ffe2ebcac6b50408a58351272e