Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea189e13ab8f43b0…

MALICIOUS

PDF

75.7 KB Created: 2021-02-20 17:54:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 294db9a2fe36087dc37c7d1b994b1bf6 SHA-1: 7d06a88c4ee0131d436950ffbd1e7e4e7bdad116 SHA-256: ea189e13ab8f43b0d61592a109cb61720ac086703a376a576e5f5e35e2c09b22
184 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, specifically as a phishing or redirector. It contains numerous embedded links, many pointing to disposable domains and employing UTM parameters, suggesting an attempt to drive traffic to malicious infrastructure. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment.

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/123?utm_term=best+whirlpool+side+by+side+refrigerator+2018 In PDF document text
    • https://cdn.sqhk.co/miweguzeg/Bidhehi/2190645602.pdfIn PDF document text
    • http://zoompol.xyz/21602718606rksbx.pdfIn PDF document text
    • http://vnatural.space/bow_tie_movie_theater_annapolis_mdk72jk.pdfIn PDF document text
    • https://cdn.sqhk.co/tefupudoma/hiidjgQ/kaiser_pharmacy_roseville_number.pdfIn PDF document text
    • http://idealica-ituficiale.website/81579998113lte53.pdfIn PDF document text
    • https://dakuwiremab.weebly.com/uploads/1/3/4/9/134901294/kasuwimopuxi_nopatowu_vikalaze.pdfIn PDF document text
    • https://cdn.sqhk.co/xekemini/igHjdxo/smash_bros_gamecube_combos.pdfIn PDF document text
    • http://fakaripeti.xyz/mx_player_not_working_in_usxaprv.pdfIn PDF document text
    • http://xorasogolu.22web.org/xivovamuwuxuxazurabete.pdfIn PDF document text
    • http://arnautmebel.ru/kenmore_elite_dishwasher_model_665_not_workingmp5s3.pdfIn PDF document text
    • http://weraka.online/skyrim_folgunthur_puzzleyioql.pdfIn PDF document text
    • http://sibefumunefeke.iblogger.org/96813134531.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://voderekop.rf.gd/womifizimesubijulorujoj.pdfIn PDF document text
    • http://duxuramubot.epizy.com/leather_business_card_holder_template.pdfIn PDF document text
    • http://vikudet.epizy.com/88087460489.pdfIn PDF document text
    • http://dabinuxorolukew.epizy.com/xupuvi.pdfIn PDF document text
    • http://nifiloxoburufi.rf.gd/63716314823.pdfIn PDF document text
    • http://relizaki.epizy.com/reference_list_for_job_template.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_off0000dcb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCB7 5888 bytes
SHA-256: 798536810389cf07dab9b8e262f72ad629c4f9cd7b5df5724d267cf40c6960fb
font_01_sfnt_off0000f0eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0EB 10040 bytes
SHA-256: ccd4e3a81f870e0b7faf2289731272daf6ab8993844b5319c4c22d1e859a03f4
font_02_sfnt_off0001131d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1131D 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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