Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d262d71bbf55703…

MALICIOUS

PDF

76.1 KB Created: 2021-03-13 18:22:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 5fae1a0932dc69852db3c3912ff3889c SHA-1: 7f45863944da9f22ea9f90c5f03e67656995150e SHA-256: 6d262d71bbf5570393d28f467ea3790d2d74eea3262619415b9530c66d940558
184 Risk Score

Malware Insights

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

The sample is a PDF document flagged by multiple heuristics as malicious, including a critical finding for linking to known malicious redirector infrastructure. The embedded URLs and the nature of the heuristics suggest a phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/123?utm_term=caste+application+form In PDF document text
    • http://gufutaca1.xyz/autodesk_virtual_agent_2017_linksjo337.pdfIn PDF document text
    • https://xuwuperozaposa.weebly.com/uploads/1/3/2/3/132303395/sozimigaberez.pdfIn PDF document text
    • https://cdn.sqhk.co/mapetidul/hnkSghh/89856502988.pdfIn PDF document text
    • http://getveran.site/a_random_walk_down_wall_street_12th_edition_freepwqxo.pdfIn PDF document text
    • http://1cats.space/new_movies_2019_app_tamilv3sws.pdfIn PDF document text
    • http://blancer.xyz/260660271842gd9a.pdfIn PDF document text
    • https://cdn.sqhk.co/jefulajidi/Uagimhj/buranelowesare.pdfIn PDF document text
    • http://fb-ig-violation.com/bowflex_elite_partseulye.pdfIn PDF document text
    • https://wuwotozon.weebly.com/uploads/1/3/4/3/134315251/jagipogirokike.pdfIn PDF document text
    • https://jedifubebevaze.weebly.com/uploads/1/3/4/8/134873515/xapaworuva_vobufisadug.pdfIn PDF document text
    • http://getsol.xyz/william_james_book_principles_of_psychology_focused_on_whatwi8a0.pdfIn PDF document text
    • http://lg-copyrightforms.com/the_metabolism_reset_diet6n9d8.pdfIn PDF document text
    • https://dajepulexito.weebly.com/uploads/1/3/4/5/134591334/wopopesalulaxaxo.pdfIn PDF document text
    • https://cdn.sqhk.co/rapovixovuti/AujdRAT/70885725550.pdfIn PDF document text
    • https://fuwelajefupeze.weebly.com/uploads/1/3/5/3/135390198/wemuni.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ligexaxo.epizy.com/70537568441.pdfIn PDF document text
    • http://jiwenufaxo.epizy.com/c5_window_envelope_letter_template.pdfIn PDF document text
    • http://fidusigugowubo.epizy.com/apfelmuskuchen_mit_schmand_springform.pdfIn PDF document text
    • http://kuwexugebukutim.rf.gd/40728323258.pdfIn PDF document text
    • http://mowigefugitixa.epizy.com/24539000390.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_off0000ece3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECE3 5064 bytes
SHA-256: 198f89e7930ca2f49568a714af88ea1671ec172961f37ec6cfd876a5f8a0aa7c
font_01_sfnt_off0000fe07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE07 10956 bytes
SHA-256: b0486433519dd3d71372beec3e1a7aad22be188520882dcab530fe2b81a22e23

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