Malicious PDF — malware analysis report

Static analysis result for SHA-256 f04fd6b01b52ad59…

MALICIOUS

PDF

111.5 KB Created: 2021-03-29 10:02:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: d1df84244233c99abb6f5407f925c832 SHA-1: 5b2ace55d4ff3b97b347a927d26760cd92f6b40e SHA-256: f04fd6b01b52ad59f2de6bc6cfa2290f133f0906cec74cecede3d84e76b41d97
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 as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous embedded URLs pointing to disposable hosting sites, suggesting an attempt to redirect users to malicious content. The document body, though heavily obfuscated, contains keywords related to the embedded URLs, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://mezovuduw.ru/award?keyword=metabolismo+bacteriana+pdf PDF link annotation
    • http://justiciaforjustice.com/boss_micro_br_80_drivermz3vc.pdfIn PDF document text
    • https://cdn.sqhk.co/batumozi/7jbkMja/81661070759.pdfIn PDF document text
    • http://all-host.site/gutitefr3tmo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475196/normal_60147b6d19b4c.pdfIn PDF document text
    • https://cdn.sqhk.co/vulovosovem/jaibjhS/impossible_euro_train_simulator_free_download_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/tovasodoj/chdhgOt/couple_halloween_costumes_scary.pdfIn PDF document text
    • http://smcjd.com/62225839357aflax.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387582/normal_5ff293b8af202.pdfIn PDF document text
    • https://cdn.sqhk.co/zoxowowi/bhfjgcj/application_ringtone_for_iphone_6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446275/normal_5fc9e5fae8038.pdfIn PDF document text
    • https://cdn.sqhk.co/mumaxeje/jhgidWH/game_maker_s_toolkit_twitter.pdfIn PDF document text
    • https://cdn.sqhk.co/kidobogi/dhixwha/arraylist_interview_questions_and_answers_in_java.pdfIn PDF document text
    • https://cdn.sqhk.co/kodivitedi/hbhfRhh/wupirawaba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4504047/normal_6044d848d7505.pdfIn PDF document text
    • https://cdn.sqhk.co/pojimisuso/a2RYJgh/papabunagasukalaxorojip.pdfIn PDF document text
    • https://cdn.sqhk.co/pavoraxebute/XifoKja/44747614803.pdfIn PDF document text
    • https://cdn.sqhk.co/foropogajag/EggOLhe/ball_sort_switch_puzzle_game_online.pdfIn PDF document text
    • https://cdn.sqhk.co/gasawivu/jg1xtjd/18941285499.pdfIn PDF document text
    • http://bcpzonasegur4viabcp.com/ludabinaxegob8uzk.pdfIn PDF document text
    • http://steelsho1.club/68758622470nv2j.pdfIn PDF document text
    • http://ceiling48.ru/kaplan_sat_practice_test_1_answers_20187vuw0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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_off000157f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x157F2 5236 bytes
SHA-256: 16924e4433ed42e3112d4db148be425da89d80f58ab1225c5adcd109f5b9f581
font_01_sfnt_off00016999.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16999 10340 bytes
SHA-256: 47f33452318e75a30a2cebddbf2b2d0fa3712b8bb11967084a010a7912285bba
font_02_sfnt_off00018ce9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18CE9 16204 bytes
SHA-256: e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15
font_03_sfnt_off0001a217.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A217 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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