Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec74e4805cc49de1…

MALICIOUS

PDF

85.5 KB Created: 2021-04-27 15:58:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 9e3c6faa639a933c2884da0c0da5520f SHA-1: 848dd36e3316c7e2611c52f4229b2dc5d03e3962 SHA-256: ec74e4805cc49de109246823ae13711220ac6424d0419e75410cde7e7c16dc9e
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm or phishing operation. The presence of a search query related to a Whirlpool appliance suggests a lure to trick users into clicking malicious links. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest malicious intent, likely for phishing or scamming purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://dugedepap.ru/strik?utm_term=whirlpool+wtw5000dw1+lid+lock PDF link annotation
    • http://tegekagag.22web.org/28114188910.pdfIn PDF document text
    • https://bofejaximolapob.weebly.com/uploads/1/3/4/7/134751884/7200633.pdfIn PDF document text
    • https://feposejixadolo.weebly.com/uploads/1/3/4/7/134744373/7265040.pdfIn PDF document text
    • https://sunivisoxeban.weebly.com/uploads/1/3/4/4/134493344/bozerufumusabex-xufetivobeju-jekev.pdfIn PDF document text
    • https://zoxamadafipezo.weebly.com/uploads/1/3/1/1/131164297/b81ab84.pdfIn PDF document text
    • https://degijidugaf.weebly.com/uploads/1/3/4/8/134886203/988683.pdfIn PDF document text
    • https://sexaxekeka.weebly.com/uploads/1/3/5/3/135313825/5963191.pdfIn PDF document text
    • http://mozakotefeg.22web.org/zuxufijerofivamabuga.pdfIn PDF document text
    • https://nesiwebe.weebly.com/uploads/1/3/5/3/135399888/8301998.pdfIn PDF document text
    • https://zusavakaki.weebly.com/uploads/1/3/0/8/130815140/5718105.pdfIn PDF document text
    • https://sazulolako.weebly.com/uploads/1/3/1/4/131453808/722e11b4ff81e5e.pdfIn PDF document text
    • http://videgimasifo.iblogger.org/order_blattodea.pdfIn PDF document text
    • https://xesefuwaruju.weebly.com/uploads/1/3/6/0/136088059/b6112a54eda6e6b.pdfIn PDF document text
    • http://pedugubugof.mywebcommunity.org/68907132120.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kopixagelaje.rf.gd/41637875166.pdfIn PDF document text
    • https://s3.amazonaws.com/rebesudanolo/how_to_set_up_hey_siri_on_iphone_6_plus.pdfIn PDF document text
    • http://webimonok.epizy.com/grade_3_math_fraction_worksheets.pdfIn PDF document text
    • http://vawanumezal.onlinewebshop.net/82060254525.pdfIn PDF document text
    • http://mexadanizim.rf.gd/mekomumarawu.pdfIn PDF document text
    • http://peledopa.myartsonline.com/the_great_hunt_grand_tour_island.pdfIn PDF document text
    • https://s3.amazonaws.com/ropuba/18523522358.pdfIn PDF document text
    • https://s3.amazonaws.com/fojaxexino/21058054346.pdfIn PDF document text
    • http://dunizolosonon.rf.gd/adobe_reader_app_for_computer.pdfIn PDF document text
    • http://panejolaraluka.rf.gd/best_bollywood_movies_free_sites.pdfIn PDF document text
    • http://puribisipup.atwebpages.com/75002609972.pdfIn PDF document text
    • http://gakilasefit.myartsonline.com/adding_integers_using_number_line_worksheet.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010eaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EAA 5260 bytes
SHA-256: 289c7234014b3d8dc3931577ee4a84414c6af130f2a8e87dc436894eeb2433af
font_01_sfnt_off000120ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120AD 11284 bytes
SHA-256: 7ce8bd5ba1e7d6397ab71f1603107f7a9c726f6ee23321be56474fa3b87ca5b9