Malicious PDF — malware analysis report

Static analysis result for SHA-256 85e012d704557982…

MALICIOUS

PDF

154.2 KB Created: 2021-03-23 10:09:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 9e1c5982256351642acdd9013b74b2f4 SHA-1: 2655a6e459361e80c8c130d631ae567d5782bce8 SHA-256: 85e012d704557982da7e01ca9489db0ab9f654e5560d3edd7405f4b5fc585a42
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs and is flagged as a link farm on disposable hosting, indicating a malicious intent to redirect users. The ML classifier and ClamAV detection strongly suggest this PDF is malicious, likely a phishing or malware distribution lure. Although no scripts were extracted, the presence of external URIs and the link farm heuristic point towards an attack pattern involving redirection to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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
  • 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://lozipotod.ru/wix?keyword=miragine+war+hacked+unblocked+google+sites PDF link annotation
    • https://cdn.sqhk.co/pefisemise/hfighgx/60162290618.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419623/normal_6013c3ef51c38.pdfIn PDF document text
    • https://cdn.sqhk.co/wefonasifaza/EjcWBSO/zelozuzaditudosabu.pdfIn PDF document text
    • http://defumemijiwof.22web.org/artificial_intelligence_darshan.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475730/normal_5ff9f0aa34cf7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496170/normal_605676a8e79be.pdfIn PDF document text
    • http://pitoxur.iblogger.org/mathematics_in_nature_project.pdfIn PDF document text
    • http://jasavutarapif.22web.org/karovivupefifiveriso.pdfIn PDF document text
    • http://retamos.mygamesonline.org/akademia_pana_kleksa_cala_ksiazka.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://df9240ce-57b4-430e-a582-521170ca5232.filesusr.com/ugd/10b03a_6d94bfc4f7a54f45930e7349b8847d96.pdf?index=trueIn PDF document text
    • http://bosulug.epizy.com/86967232320.pdfIn PDF document text
    • https://681956c7-2c57-495f-b996-d04b50c745b0.filesusr.com/ugd/907d98_ed2758dbdf814f65837c369ba9f622e4.pdf?index=trueIn PDF document text
    • http://tikimiwuwal.myartsonline.com/sapujowipoleragarirati.pdfIn PDF document text
    • http://lusuzajemofim.rf.gd/dekuxebepagowazi.pdfIn PDF document text
    • http://gadomorepizof.epizy.com/architektura_komputerw_biernat.pdfIn PDF document text
    • http://nununad.myartsonline.com/fomirujeb.pdfIn PDF document text
    • https://8d67285a-e3c5-4820-bb1a-bb91ce1079a6.filesusr.com/ugd/d54300_6499c19b1731465d9111acfe487ee7aa.pdf?index=trueIn PDF document text
    • https://5057b38b-f250-4925-a5fd-2dbc054a2c1f.filesusr.com/ugd/25ee37_d6c11030becd40a181d5aec081777602.pdf?index=trueIn PDF document text
    • http://gimezevu.epizy.com/pojigoto.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://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001d42b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D42B 6948 bytes
SHA-256: 7b5af63121e3e1050ea531a469fb8b9cd6c63bff65234b5b32fcbb5282d3d9fd
font_01_sfnt_off0001eb40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EB40 5500 bytes
SHA-256: fc48d7a333190c2118ccd507d0cadf2cf77fc9b63e05f47da75db8193d9abdff
font_02_sfnt_off0001fdfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FDFA 9792 bytes
SHA-256: ee9f8d0c44b4979d6141742ebe210d8d26d8925427f8873606be81c197188e52
font_03_sfnt_off00021993.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21993 14500 bytes
SHA-256: f9ede289086db98a36fe1156d0b59515cfb23010b69a4246635ab6ce1a976d7f
font_04_sfnt_off00024400.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x24400 16656 bytes
SHA-256: 8e4ab02915233cdf34ec16de4f77344a056edacc5dfaaaec2318e00ddbd17b9e