Malicious PDF — malware analysis report

Static analysis result for SHA-256 3aab736e772bc78c…

MALICIOUS

PDF

107.7 KB Created: 2021-06-11 15:04:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: ca7df3f720e3614cf89c91e370da0296 SHA-1: 55bdc346dd08b78a17ac58a29d9bd35cf65ccce9 SHA-256: 3aab736e772bc78ca764196b76adfff6b6ffeebb6aa09ebdfc9fe5678ef54663
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many pointing to disposable hosting services, suggesting a link farm designed to direct users to potentially harmful content. The presence of embedded URLs and the overall structure strongly suggest an attempt to exploit users through deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://allytemp.ru/pbw?utm_term=best+th10+anti+3+star+war+base PDF link annotation
    • https://jipunusib.weebly.com/uploads/1/3/0/8/130813609/5227536.pdfIn PDF document text
    • https://wobomiti.weebly.com/uploads/1/3/4/5/134501920/vefemab-zobesoge-zoxakoluturo-gobimezija.pdfIn PDF document text
    • https://ratipiju.weebly.com/uploads/1/3/0/7/130740089/xumididalimazas-nakirunopuwago.pdfIn PDF document text
    • https://fukorolavo.weebly.com/uploads/1/3/4/6/134639224/5527875.pdfIn PDF document text
    • https://zubetotuduve.weebly.com/uploads/1/3/5/3/135340520/b86f5d742bd33cb.pdfIn PDF document text
    • https://bekazavaf.weebly.com/uploads/1/3/5/3/135327011/wijudefatuxufigo.pdfIn PDF document text
    • https://tatefelerer.weebly.com/uploads/1/3/5/9/135966089/b4ecf0f6921.pdfIn PDF document text
    • https://subetemezam.weebly.com/uploads/1/3/4/5/134588087/suxogiselalari.pdfIn PDF document text
    • https://xizenajagixofus.weebly.com/uploads/1/3/4/6/134657686/2607054.pdfIn PDF document text
    • https://vazoxavaver.weebly.com/uploads/1/3/4/8/134863882/7616f975.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wodotazisib.pbworks.com/w/file/fetch/144831651/jabiwoxotazer.pdfIn PDF document text
    • http://mijatonevu.pbworks.com/f/the_lion_king_movie_filmywap.pdfIn PDF document text
    • http://zubipuwaf.pbworks.com/w/file/fetch/144528708/32299621811.pdfIn PDF document text
    • http://bevojoluvu.pbworks.com/w/file/fetch/144472089/71292203006.pdfIn PDF document text
    • http://metudebebi.pbworks.com/f/how_to_activate_windows_8_pro_build_9200_permanently_for_free.pdfIn PDF document text
    • http://kuperuxowix.pbworks.com/f/cambridge_english_for_engineering_mark_ibbotson_free_download.pdfIn PDF document text
    • http://moxulolo.pbworks.com/f/jobuzaxokigafu.pdfIn PDF document text
    • http://gejulolupob.pbworks.com/f/project_igi_2_full_version_download.pdfIn PDF document text
    • http://gudotoxej.pbworks.com/f/77517166390.pdfIn PDF document text
    • http://tevidaxen.pbworks.com/f/baby_shark_trap_remix_1_hour.pdfIn PDF document text
    • http://detomipipu.pbworks.com/f/bilingual_first_language_acquisition_annick_de_houwer.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014ce1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14CE1 5380 bytes
SHA-256: 4b102baf05bc242118d8c34d1576faf6d578cad2e69d0b1ecf97f96e141f9794
font_01_sfnt_off00015f41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15F41 14776 bytes
SHA-256: 43451e2d351ea1ffa22d9d21e70248eec04f01efd4aece9ccf9e341682aa2fde
font_02_sfnt_off00018c0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18C0B 16212 bytes
SHA-256: 2f7e192e3eed75d99de052c5035c37e2f6341d650a78ca3e7a5a802cb9a6ae2b