Malicious PDF — malware analysis report

Static analysis result for SHA-256 05b6048474cd5fbc…

MALICIOUS

PDF

70.9 KB Created: 2021-03-23 05:14:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 116808851f541d8e0ea2cdf57744e065 SHA-1: c766a833b33008ba6e2f2b4f766104b72af000f6 SHA-256: 05b6048474cd5fbc1a63ab44e237d3428890b07d580364dd0193e42b39c5ac2b
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with at least one pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The document body, though heavily obfuscated, appears to be a lure related to a search query, suggesting a targeted phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://crophysi.ru/strik?utm_term=how+to+find+average+density+of+a+planet In PDF document text
    • http://kezerojipogut.iblogger.org/39781820895.pdfIn PDF document text
    • https://cdn.sqhk.co/bawevabob/hhjj9gj/fumopananukutozuk.pdfIn PDF document text
    • http://netekigupi.22web.org/full_hd_wallpapers_1080p_for_laptop.pdfIn PDF document text
    • http://letabumo.getenjoyment.net/87933807783.pdfIn PDF document text
    • https://cdn.sqhk.co/totarujined/hijbjdd/84035839817.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416302/normal_601f87ce8b7c7.pdfIn PDF document text
    • http://betizekaxu.getenjoyment.net/paxolafirirosa.pdfIn PDF document text
    • http://woxuruko.medianewsonline.com/direccin_universidad_nacional_de_colombia_sede_medelln.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450044/normal_6057e0d4c3b70.pdfIn PDF document text
    • https://cdn.sqhk.co/wanaxowuwot/Jjjggcl/9061587964.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422893/normal_602a2630f3fbc.pdfIn PDF document text
    • http://bidizujimon.getenjoyment.net/86572136140.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490116/normal_5ff138635b504.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/debamijizozexo/savumowogerodazilaresesir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfc1e560-6294-4c5d-bf4f-149e653b3501/xutabegetoxilemagatuka.pdfIn PDF document text
    • https://s3.amazonaws.com/tuzakifezara/nopurija.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/379bde5b-827a-492f-b1fa-df68a3ea731c/everything_will_be_good_meaning_in_tamil.pdfIn PDF document text
    • http://lotawopobakitab.epizy.com/wojagisoxo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cbf90aa5-d8c0-4f4a-8fe7-057a5a58f543/dometic_ac_control_board_replacement.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e2f0693-9ec6-4e4b-bc58-bc613a5f5ca3/bugikanaserew.pdfIn PDF document text
    • http://muwadobekele.rf.gd/93800223734.pdfIn PDF document text
    • http://ginowane.onlinewebshop.net/pathophysiology_of_crohn_s_disease.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3b19649-3b96-4bb8-bf77-9d700664b2d6/past_perfect_simple_past_exercises_english_hilfen.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_off0000d566.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD566 5424 bytes
SHA-256: 3d5c48ee41b7df362f7b963bf4f3696d0b6dab98de1a399937922a11b017f25e
font_01_sfnt_off0000e809.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE809 11424 bytes
SHA-256: 725edb3541a7fc86b474c5dbb3162aab4e8d379d591aa55f18a9bca01f148301