Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5f68f3b92435613…

MALICIOUS

PDF

81.1 KB Created: 2021-03-15 23:30:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e33e4209c80f61a27e806d80a51e564f SHA-1: 92c12ecb423fe371f352e386544dfba3826a67f7 SHA-256: a5f68f3b9243561343319c75be0f137c3fd715e36f9909beb8bc3187a957f5bb
186 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The embedded content, though partially corrupted, includes a URL related to watching movies online, which is a common lure for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • 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 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://pelibifir.ru/wix?keyword=watch+hunger+games+mockingjay+part+2+online+free+123movies
    • https://jurujixomegisi.weebly.com/uploads/1/3/4/7/134745805/tepug.pdf
    • http://bosemefawixuwov.mypressonline.com/gejuvopujijijedifurug.pdf
    • https://jizexukufi.weebly.com/uploads/1/3/4/1/134109318/zajavumogudipokis.pdf
    • https://zewugijisisu.weebly.com/uploads/1/3/4/8/134885238/batezumez.pdf
    • http://segikusi.22web.org/pukawinovenexu.pdf
    • http://gudutisiluzew.mypressonline.com/77541120433.pdf
    • https://sabexezoguge.weebly.com/uploads/1/3/1/4/131483217/acffb95cf689.pdf
    • https://cdn.sqhk.co/pigexebobe/jhihe9z/kosaxatudalafumiso.pdf
    • http://sexogovo.iblogger.org/69934436518.pdf
    • http://kopuvimu.scienceontheweb.net/hcna_networking_study_guide_1st_ed._2016_edition.pdf
    • https://cdn.sqhk.co/buxifuludo/Rqjewjw/business_strategic_planning.pdf
    • https://mobuverafawez.weebly.com/uploads/1/3/5/3/135346795/jonujurariso.pdf
    • http://depalowivejal.iblogger.org/residential_aged_care_guidelines.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://bununosaj.epizy.com/40117154546.pdf
    • https://bdee3e82-1fe6-4084-b289-f15f5249f83e.filesusr.com/ugd/749937_3a0442fc26814e388bb26bfb629dad1e.pdf?index=true
    • https://e86c6366-0652-46cb-9e1f-5633a133dba9.filesusr.com/ugd/510a18_fa999ffffa4642d995c8d0a16647f293.pdf?index=true
    • https://c4a0f302-b060-43a0-af10-a0364da5eca7.filesusr.com/ugd/c6d327_ec4c092f06c54885b46069e22b43a7e1.pdf?index=true
    • http://tipipigi.atwebpages.com/boxido.pdf
    • https://907864b8-ab38-4b43-b195-7646ee37c451.filesusr.com/ugd/c4b402_b20265b8c6db424cb7f9157fa0341802.pdf?index=true
    • https://a6132035-7465-4fe4-be4e-2faa96c22dab.filesusr.com/ugd/cf950b_06d042689b4b40efac50951bde87950e.pdf?index=true
    • https://5e446c31-fcb6-4427-a178-91ee45bbff8b.filesusr.com/ugd/4e76b8_52d4f088eecf4a1b9c087da1ebce8f7f.pdf?index=true
    • http://solugivewatewa.myartsonline.com/python_the_complete_reference_github.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fbfe.bin
1a32e26665674ea9bf7972e41be24dad7466bf9cea0aa2044641cdd2d065fb7c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFBFE 6092 bytes
font_01_sfnt_off000110be.bin
a98128556698c2f4799dad4861568ed94dced52154faeb5675d84bb83d520c4c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x110BE 10352 bytes

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