Malicious PDF — malware analysis report

Static analysis result for SHA-256 589f52fc3566cc89…

MALICIOUS

PDF

80.0 KB Created: 2021-02-26 09:01:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 5936a6c8b26e307246bd1b077272d1ba SHA-1: 0efc2328dda599e8da1b02752dfa8d4c05895d9e SHA-256: 589f52fc3566cc89ab056ba906427b4c8c67ad80d4cdc4eaa2a92cab0f9a393e
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to disposable domains, designed to redirect users to malicious content. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' specifically flags a link to 'yafferge.ru' as malicious. The ML classifier also strongly indicated maliciousness. While no scripts were extracted, the document's structure and embedded links strongly suggest a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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=home+depot+drill+guide In PDF document text
    • http://turekawetareju.iblogger.org/grounding_for_the_metaphysics_of_morals_chapter_1_summary.pdfIn PDF document text
    • http://dipufuvolog.iblogger.org/sony_smart_android_tv_55_inch.pdfIn PDF document text
    • https://cdn.sqhk.co/pirujezexod/Yhh93ij/14180090865.pdfIn PDF document text
    • https://cdn.sqhk.co/lafuwexale/5ljcjhC/lozenixamexu.pdfIn PDF document text
    • https://cdn.sqhk.co/sozivowemin/fgiXheS/88697918108.pdfIn PDF document text
    • http://judugasolunived.22web.org/systems_of_equations_word_problems_worksheet_algebra_1.pdfIn PDF document text
    • https://cdn.sqhk.co/siloneza/ajaJbxN/tolipegugefewixewupikud.pdfIn PDF document text
    • https://cdn.sqhk.co/patagarinixa/a2Qzjjn/screen_recorder_for_windows_7_32_bit.pdfIn PDF document text
    • https://cdn.sqhk.co/nusideja/nglihIE/19477266374.pdfIn PDF document text
    • https://cdn.sqhk.co/kapapomabu/wgcjckm/great_white_shark_hunted_by_killer_whale.pdfIn PDF document text
    • https://cdn.sqhk.co/gabixeme/bihUIie/space_for_baby_chicks.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://rizaraj.rf.gd/rarib.pdfIn PDF document text
    • http://gimusatis.rf.gd/sole_e95s_for_sale.pdfIn PDF document text
    • http://nowutakifotekes.epizy.com/rom_ti_89_titanium_para_android.pdfIn PDF document text
    • http://jezevenakos.myartsonline.com/how_to_put_clock_hands_on_a_clock.pdfIn PDF document text
    • http://gonoluripep.rf.gd/girurumezuzogad.pdfIn PDF document text
    • http://kopolug.myartsonline.com/23796744866.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0B4 4628 bytes
SHA-256: d6283adbc34391c50809d7ac997689a3d08ace315f7e13c67b1b80e9e0213a34
font_01_sfnt_off00010078.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10078 10644 bytes
SHA-256: f9d6e63a34e31f1d2d596537f88cd5201cda9878042cc08d248548f43e19f38f
font_02_sfnt_off000124ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124EE 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

Open this report in the interactive analyzer, or submit your own file for analysis.