Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e7fd3227e0b9895…

MALICIOUS

PDF

80.9 KB Created: 2021-02-16 10:10:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: b2eeec2e7ced7877cc843ce601302e61 SHA-1: 20c84eb650b6aaf1ab968a6293f2e6de1ae136ec SHA-256: 3e7fd3227e0b98955e9c8c553ee6005f788365ba8486ec8e356c24f7b554f673
184 Risk Score

Malware Insights

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

This PDF file contains multiple embedded URLs, with at least one pointing to known malicious redirector infrastructure. The heuristic firings indicate it's a link farm on disposable hosting, designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://yafferge.ru/aws?utm_term=how+much+does+cat+diabetes+cost+to+treat In PDF document text
    • https://cdn.sqhk.co/sovanoniwuva/ghEigif/1_to_100_numbers_in_english_video.pdfIn PDF document text
    • http://teplotronic.ru/email_template_to_inquiry_about_a_jobcvlc2.pdfIn PDF document text
    • https://cdn.sqhk.co/lebexuzo/jn1uMUD/wizope.pdfIn PDF document text
    • http://loveantravel.xyz/87023198596sr926.pdfIn PDF document text
    • http://netewe9.xyz/mic_kbpc3510_datasheetj3j2m.pdfIn PDF document text
    • https://cdn.sqhk.co/pulafefer/duxNbe0/rise_of_kingdoms_commander_pairing_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/pobusafi/cRHI9ic/battle_tank_1990.pdfIn PDF document text
    • https://cdn.sqhk.co/reretukida/iagcAgd/metal_slug_anthology_pc_portable.pdfIn PDF document text
    • https://cdn.sqhk.co/kulobibab/fCjcnsX/adidas_shoes_for_kids.pdfIn PDF document text
    • http://santand-es.com/nupuwemufefa6pltl.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
    • https://s3.amazonaws.com/retisovojor/20256235348.pdfIn PDF document text
    • https://s3.amazonaws.com/juliziwojatige/epic_handshake_meme_template.pdfIn PDF document text
    • https://s3.amazonaws.com/ximupuv/circular_motion_kinematics_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/wavunot/gethsemane_jcs_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/vukumesoj/bluetooth_driver_for_windows_10.pdfIn PDF document text
    • http://kowisefofob.epizy.com/69337686412.pdfIn PDF document text
    • http://fanurumuge.epizy.com/betty_boop_charlie_puth.pdfIn PDF document text
    • https://s3.amazonaws.com/votubukaxogilix/reridijibubivi.pdfIn PDF document text
    • http://savuxerekeze.epizy.com/93580125437.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_off0000f17e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF17E 5116 bytes
SHA-256: 569cfc465a44b429af895de7cc330a7e637100a8fb94e4c12d61467556106e39
font_01_sfnt_off000102ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102EC 10988 bytes
SHA-256: 565f10bd173b94edf57e7c3923a8d2a6dd678549b307833c01cf8d2fe5593e20
font_02_sfnt_off00012859.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12859 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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