Malicious PDF — malware analysis report

Static analysis result for SHA-256 9073866396e32bd7…

MALICIOUS

PDF

79.1 KB Created: 2021-04-14 10:19:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 081380d631b12e1649a31c37cac6fa2f SHA-1: e50e5c37976ded5b99499f4137d011b6874bfc24 SHA-256: 9073866396e32bd7e305268a6ca7d940faabf52862d0040d2efad75f5ae25d9f
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable hosting, and is flagged by multiple heuristics as a link farm and potential phishing or malware distribution vector. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious sites, likely for phishing or to download further payloads.

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://jumiwimov.ru/strik?utm_term=cyberpunk+improve+fps+reddit PDF link annotation
    • http://ru-payment.casa/pupolilasijiwavuwidisix5laef.pdfIn PDF document text
    • http://reactivascotia2020.com/screen_recorder_video_recorder_app_downloadt095b.pdfIn PDF document text
    • https://wexasubofuxumeb.weebly.com/uploads/1/3/2/7/132740188/85be0bda4.pdfIn PDF document text
    • https://cdn.sqhk.co/botuvawezej/thaxgj0/i_will_stick_with_you_quotes.pdfIn PDF document text
    • https://zodazapel.weebly.com/uploads/1/3/4/5/134511258/1812048.pdfIn PDF document text
    • https://cdn.sqhk.co/linewebozid/gifLibs/gold_booty_shorts.pdfIn PDF document text
    • https://jezasozogederek.weebly.com/uploads/1/3/5/9/135960593/turusejubus.pdfIn PDF document text
    • https://cdn.sqhk.co/dijabidasu/W35ghia/jump_the_rope_party_hoppers.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://bb55feb6-a0c4-48ae-8f72-aea2c45912f8.filesusr.com/ugd/b9801a_9694531c4f234adcb51ed797c282f5db.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sorapobuk/how_to_turn_off_krups_coffee_maker.pdfIn PDF document text
    • https://6e37e838-c278-4d46-baa9-25b8497af200.filesusr.com/ugd/fbcb80_31f5f02d4682409d97f99c2ba9a1eacc.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/249e06eb-7cad-41b6-86d8-7575bc92dffa/manual_unico_de_policia_judicial.pdfIn PDF document text
    • https://bbaef297-c986-4b42-acb3-0fd65605e280.filesusr.com/ugd/e9fc71_e138fcdcc4044c3897dee02f6399f103.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/donarepemi/drivers_acer_aspire_one_zg5_windows_7_32_bit.pdfIn PDF document text
    • https://6f672a44-e16c-4921-a0f1-e3781c0647c5.filesusr.com/ugd/bda22a_472de063a3b24f37b09e9a2a7b8ccaa5.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5aab2532-5709-440c-b26c-f04b57e1b50e/the_neverending_story_3_cast.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4906be6a-5ad3-4a6e-ada3-b453099c88b9/free_urdu_romantic_novels_download.pdfIn PDF document text
    • https://s3.amazonaws.com/mokamoba/apex_tv_codes_for_spectrum_remote.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_off0000f83a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF83A 5216 bytes
SHA-256: 3eeb7c269856dbedc4d77ae1d0c69d620c961f3b521c18ab18370c9ad93ca276
font_01_sfnt_off000109ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109EC 11056 bytes
SHA-256: 58d30ef555a3964f084b29e37bd9d7c722ca9cedf420facd311876eafeb6f640

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