Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac2247ae47a76968…

MALICIOUS

PDF

80.9 KB Created: 2021-03-22 20:12:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 22abf98b2acb2630122d58d058c4a35c SHA-1: 36a062b71023b28cbe7a383bbfca3d9eba587d00 SHA-256: ac2247ae47a769682d5f989baa5fab67181c034bfc1baf300e017926a5ca1e4c
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm designed to redirect users to potentially malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The embedded URL heuristic confirms the presence of links within the document body.

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 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.
  • 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://dafemum.ru/strik?utm_term=how+can+i+tell+how+old+my+worcester+boiler+is In PDF document text
    • https://raguwamirib.weebly.com/uploads/1/3/4/6/134630778/baxerirofejabef.pdfIn PDF document text
    • https://nanoxoxudotu.weebly.com/uploads/1/3/0/8/130814682/559455.pdfIn PDF document text
    • https://wofalexo.weebly.com/uploads/1/3/4/6/134697980/rowulutiwuv.pdfIn PDF document text
    • https://jadetikoj.weebly.com/uploads/1/3/5/3/135350844/7633808.pdfIn PDF document text
    • https://dawemewi.weebly.com/uploads/1/3/4/7/134747996/1036217.pdfIn PDF document text
    • https://gowigejovijori.weebly.com/uploads/1/3/0/7/130740297/dejupejawapetoje.pdfIn PDF document text
    • https://zanixikowupu.weebly.com/uploads/1/3/1/4/131437740/5281640.pdfIn PDF document text
    • http://kimokabif.medianewsonline.com/susologuwiw.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/fizufapu/xuruv.pdfIn PDF document text
    • https://s3.amazonaws.com/tunenijexe/easl_hepatitis_b_treatment_guidelines.pdfIn PDF document text
    • http://zezatavaveb.epizy.com/zawikexok.pdfIn PDF document text
    • http://piwosilavor.epizy.com/71155167260.pdfIn PDF document text
    • https://s3.amazonaws.com/jupevuxirapi/how_much_does_staples_charge_for_shredding_paper.pdfIn PDF document text
    • http://tebaputazaxuva.myartsonline.com/guia_ceneval_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/joterige/baby_grand_piano_yamaha.pdfIn PDF document text
    • https://s3.amazonaws.com/wozowuledij/40486187160.pdfIn PDF document text
    • https://s3.amazonaws.com/jixerubowi/tabla_de_verbos_en_ingles_irregulares_y_regulares.pdfIn PDF document text
    • https://s3.amazonaws.com/sazomo/words_that_begin_with_z_to_describe_someone.pdfIn PDF document text
    • http://milatosokalazer.epizy.com/zekekeduxodovut.pdfIn PDF document text
    • https://s3.amazonaws.com/wanasuvedigo/haier_washer_dryer_combo_walmart.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_off0000fce5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCE5 5472 bytes
SHA-256: 1a2f46cdface61b7f7976677c2031a9779575415f2e5c3133470b1adf432ee6f
font_01_sfnt_off00010f5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F5F 11300 bytes
SHA-256: c6fca781fa3ae0ef6f609a455e670cfbf2f69ad71777ba35f0461ea6deba07bb

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