Malicious PDF — malware analysis report

Static analysis result for SHA-256 10a73ae88d54397f…

MALICIOUS

PDF

77.1 KB Created: 2021-03-21 08:31:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: cd5aa6def0e3886f1b1eef2c4c640440 SHA-1: 5835e3433884fc27d1395630bd85714008038b68 SHA-256: 10a73ae88d54397fff3e5ff5a3b63de95858156ec42010be7c82334319f96eb1
164 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to other PDF files, suggesting a link farm or a method to distribute further malicious content. The presence of a 'Download Now' lure and the ClamAV detection as 'Pdf.Phishing.Trojan' strongly indicate a malicious intent to trick users into downloading harmful files. While no scripts were directly extracted, the PDF structure and heuristic firings point towards a phishing or malware distribution scheme.

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.
  • 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://kuzutuzo.ru/wix?keyword=best+wallpaper+hd+apk+download PDF link annotation
    • http://gurotazejo.22web.org/wasoxekowokelexu.pdfIn PDF document text
    • http://bokulidedasez.22web.org/vampire_diaries_books_vs_series.pdfIn PDF document text
    • http://sinekem.iblogger.org/24120368507.pdfIn PDF document text
    • http://loberas.22web.org/89969655229.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fezovinu.epizy.com/tejunarifenoz.pdfIn PDF document text
    • https://s3.amazonaws.com/befarekogol/68878924359.pdfIn PDF document text
    • https://s3.amazonaws.com/zuniverijesud/52003405978.pdfIn PDF document text
    • http://wedutatitupaze.epizy.com/beauty_and_the_beast_pics.pdfIn PDF document text
    • https://s3.amazonaws.com/gupawupigawono/12993785178.pdfIn PDF document text
    • https://s3.amazonaws.com/jefobexapulow/26692063757.pdfIn PDF document text
    • https://s3.amazonaws.com/kovezodepugov/48886103438.pdfIn PDF document text
    • https://s3.amazonaws.com/musokejixami/kerbal_space_program_mods_nexus.pdfIn PDF document text
    • https://ca7c05ed-d233-4774-9cf9-08ff86aa6c73.filesusr.com/ugd/b42fd6_ebb5a5e3a37a4b4581a8066d1989e9bc.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/juvetaso/dna_replication_animation_answer_key.pdfIn PDF document text
    • https://99b08629-27b2-41dd-83a1-938dc2ca35bd.filesusr.com/ugd/067ecb_8d4b950412ef4618ba74268ad635867c.pdf?index=trueIn PDF document text
    • http://zojasofox.epizy.com/countdowns_sleeping_at_last_piano_sheet_music.pdfIn PDF document text
    • http://xunawikavamenu.epizy.com/71961016827.pdfIn PDF document text
    • https://s3.amazonaws.com/jumedemimo/65241456376.pdfIn PDF document text
    • https://s3.amazonaws.com/nafoxuda/mobabi.pdfIn PDF document text
    • http://rabopusafat.epizy.com/84666856578.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_off0000eedf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEDF 5252 bytes
SHA-256: 0c7f66adb7ed2d38b9efe321065b4b85d5789b7bed0aa65ddec5446ff12cfd2e
font_01_sfnt_off000100c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100C7 11188 bytes
SHA-256: 36ba63400f35adecab1e49b7077e15a256eb9eac8c856a445d941cf4799334a6

Open this report in the interactive analyzer, or submit your own file for analysis.