Malicious PDF — malware analysis report

Static analysis result for SHA-256 e813209caea99969…

MALICIOUS

PDF

73.4 KB Created: 2021-03-03 06:43:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 8cf09dd00a2bda6248f8ba5704ce69d5 SHA-1: e733ab1dd079136a9f7abf30e2112ba2191a14df SHA-256: e813209caea99969c75a5187f07d641684d4fc91f4066baf3d9f0e924de40380
134 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://golowaki.ru/strik?utm_term=deepak+chopra+21+days+of+abundance+day+21 PDF link annotation
    • http://muzhskoizhurnal.ru/how_to_unlock_a_motorola_phone_if_you_forgot_the_password02710.pdfIn PDF document text
    • https://zovarufegurer.weebly.com/uploads/1/3/4/6/134625168/6355944.pdfIn PDF document text
    • https://tuzisufuga.weebly.com/uploads/1/3/4/4/134458332/397a1a42e919fa.pdfIn PDF document text
    • https://matigolexa.weebly.com/uploads/1/3/2/6/132682665/5546936.pdfIn PDF document text
    • http://mugedly.xyz/42474003724asdv5.pdfIn PDF document text
    • https://renobikedasel.weebly.com/uploads/1/3/4/8/134897329/nezewupanabuw.pdfIn PDF document text
    • https://wariraxaluxar.weebly.com/uploads/1/3/3/9/133986847/wukenedijuw.pdfIn PDF document text
    • https://tajewarupimef.weebly.com/uploads/1/3/2/6/132681391/sunavexe-gonajijuvuvun-fupatuwulopud.pdfIn PDF document text
    • https://jasefukop.weebly.com/uploads/1/3/0/7/130776564/3255718.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nibewisule.epizy.com/xininekox.pdfIn PDF document text
    • https://s3.amazonaws.com/figugipopar/biolite_n2_datasheet.pdfIn PDF document text
    • https://s3.amazonaws.com/feborobegibew/why_is_my_samsung_electric_dryer_not_getting_hot.pdfIn PDF document text
    • https://s3.amazonaws.com/xeroguru/bioplastic_pla_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/kaxukok/24075832694.pdfIn PDF document text
    • https://s3.amazonaws.com/saziwijaxodav/amazing_world_game_free.pdfIn PDF document text
    • https://s3.amazonaws.com/paxuvagal/solving_linear_equations_in_one_variable_word_problems_worksheet.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_off0000e010.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE010 5700 bytes
SHA-256: 2e4399bd3da27342a7c65366e013a28be6b55a289102ddefbf9a559930bc30a9
font_01_sfnt_off0000f387.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF387 10656 bytes
SHA-256: 23db6aa49aeaa0accf388b1481899df6e34cbcb8900aa3c7e2acd6af6a92bedb