Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6344b98f6e91be2…

MALICIOUS

PDF

76.9 KB Created: 2021-03-24 21:01:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: fd241ed1921358289ad8e341ed04cf14 SHA-1: 58c914744a32c30a9360ea92b8d9099c9ecc2b73 SHA-256: d6344b98f6e91be2801be8d8c8da68856ef691ee271df7b0a1d8530260f388d3
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as a link farm and contains a high ML score for maliciousness. It embeds numerous external URLs, including one pointing to 'dugedepap.ru', suggesting an attempt to redirect users to potentially malicious content. The presence of PDF_SEO_LINK_FARM and PDF_SEO_DISPOSABLE_LINK_FARM heuristics indicates a deliberate effort to create a network of links, likely for SEO manipulation or to host phishing lures. No scripts were extracted, but the overall structure and URL distribution strongly suggest a malicious intent to drive traffic to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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=alcatel+one+touch+pop+c9+hard+reset PDF link annotation
    • https://wumigativagulam.weebly.com/uploads/1/3/1/6/131637174/2200982.pdfIn PDF document text
    • https://kopaluzakiletal.weebly.com/uploads/1/3/0/7/130739322/gukezuwetukes.pdfIn PDF document text
    • https://gewuvakir.weebly.com/uploads/1/3/4/6/134660990/sajatuvuju_pekapixorela_luwurituk_tipedopuk.pdfIn PDF document text
    • https://rusolozotiwar.weebly.com/uploads/1/3/5/9/135992237/7587787.pdfIn PDF document text
    • https://xomitemekebok.weebly.com/uploads/1/3/4/8/134881854/3a49a.pdfIn PDF document text
    • https://kibopomirisusi.weebly.com/uploads/1/3/2/7/132741064/211538.pdfIn PDF document text
    • https://cdn.sqhk.co/dosakupu/dbWxYgg/stream_nfl_games_live_free_online_batman.pdfIn PDF document text
    • https://cdn.sqhk.co/ferorigife/TidRico/sewutiwupogazaxexi.pdfIn PDF document text
    • https://timelasabo.weebly.com/uploads/1/3/4/3/134345700/7871839.pdfIn PDF document text
    • http://nomolizuxabid.22web.org/66389493733.pdfIn PDF document text
    • https://sukuwakutas.weebly.com/uploads/1/3/4/6/134603616/zapuvidefelata.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/665982f8-7971-4d53-8ec1-4a14e6fc9182/farmall_h_for_sale_in_michigan.pdfIn PDF document text
    • https://s3.amazonaws.com/tizowodifi/yahoo_mail_email_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77180e71-2aff-4925-a801-be1e82f5c4e3/romeo_and_juliet_1996_soundtrack.pdfIn PDF document text
    • http://zelafofavelak.epizy.com/poster_bodoni_bt_font_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ee8a5a7-db1d-48ac-a8d8-acdf5c747388/amar_chitra_katha_online_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/regovadeje/the_exorcist_movie_trailer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a1b8241-ce92-408c-97c5-474f2f330457/perfect_english_grammar_gerunds_and_infinitives_exercise_4.pdfIn PDF document text
    • https://s3.amazonaws.com/jolituzoji/24404629556.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_off0000ec95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC95 5304 bytes
SHA-256: de5662c62d6d07d70b0698b6b8b44e2998ab40236e6c6d1d4f31972a571eb6d7
font_01_sfnt_off0000fe95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE95 12364 bytes
SHA-256: 28325cca284dab62096dfeccab6ee7f921ac32aa76765ed48d572111773a3fb1