Malicious PDF — malware analysis report

Static analysis result for SHA-256 715a8a3a191e97e7…

MALICIOUS

PDF

96.6 KB Created: 2021-02-26 01:12:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 6828b519cc64c05f7e0bfd5daac87c0f SHA-1: 26fb8c75e436f64dc3d2907487b09299f36db876 SHA-256: 715a8a3a191e97e7ab7ff9218fad0e729ef1ebddceb73ac225795b7db357f597
126 Risk Score

Malware Insights

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

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The presence of external URIs and the 'link farm' heuristic strongly suggest the document's purpose is to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://druttle.ru/123?utm_term=bhagavad+gita+dhyana+sloka+lyrics+in+tamil PDF link annotation
    • http://joteruzawareba.iblogger.org/guide_rock_ne_diversion_dam_drowning.pdfIn PDF document text
    • http://online-sistem.site/software_asset_management_policym9nsc.pdfIn PDF document text
    • https://manomukujoputu.weebly.com/uploads/1/3/4/5/134517900/3c379186f9.pdfIn PDF document text
    • http://popularchoice.space/1000_palabras_basicas_en_ingleslxthl.pdfIn PDF document text
    • http://itsamorem.com/arya_2_full_movie_tamil_dubbedmylt4.pdfIn PDF document text
    • http://nufapivevavenak.22web.org/bekixapidivewumore.pdfIn PDF document text
    • http://lngcliente.com/far_cry_5_bookworm_errorbnala.pdfIn PDF document text
    • https://sapobukemofox.weebly.com/uploads/1/3/5/9/135974899/xitojovo.pdfIn PDF document text
    • http://particuliers-societegenerale.xyz/full_course_-_learn_english_grammar_lessons_for_beginners_elementary_intermediatey55ug.pdfIn PDF document text
    • http://twenty-promo2020.ru/89921646947aw9io.pdfIn PDF document text
    • http://buylettersonline.com/liweworewaweknl7ys.pdfIn PDF document text
    • http://verification-help.business/lepikasogusoxuxelevawakilgt4uv.pdfIn PDF document text
    • https://romidemifavev.weebly.com/uploads/1/3/1/8/131857114/febuniwolesevifawo.pdfIn PDF document text
    • http://copyright-notice-ig.com/cnc_macro_programming_exampleszmvgg.pdfIn PDF document text
    • http://lasns.fun/voradupugab0mc8.pdfIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zepurudevivo.rf.gd/the_tube_amp_book_aspen_pittman_download.pdfIn PDF document text
    • http://lutesugobomo.epizy.com/how_to_use_a_peg_tube_cleaning_brush.pdfIn PDF document text
    • http://temekem.epizy.com/dough_sheeter_for_sale.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off00015477.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x15477 8412 bytes
SHA-256: 2ca4c516a39a6200f57fffb790eaf15684f54877bd5a084983b8d85ce0d1e7ac
font_00_sfnt_off0000fa91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA91 5628 bytes
SHA-256: fb1629340d178e847b08cea4389b7a9f96a692be68c4ff7c0e43f1f968724e6c
font_01_sfnt_off00010d9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D9D 3772 bytes
SHA-256: b9b49a3c453c53986d7a61d4291ac5a87065d82ff96be43ef0dca6427e6dc540
font_02_sfnt_off00011941.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11941 12120 bytes
SHA-256: 5b95602c603cd6c61224ff0976cf12b789fe858fa95f409472d157d6a843eec3
font_03_sfnt_off00013f71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F71 16096 bytes
SHA-256: 292b67320f20e7e38814323bff47001ccb55b5eebb397aea8a254f3e91f57b87