Malicious PDF — malware analysis report

Static analysis result for SHA-256 60d5e25dfb4bca21…

MALICIOUS

PDF

90.1 KB Created: 2021-03-26 05:57:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 70b8dffce14d701a0365cc3e58357e1c SHA-1: 67e5f38cd9962bae8ff9a6baecc5368369d074e4 SHA-256: 60d5e25dfb4bca2119be680e8ee3ecd467af6b298f4f6c52945cd679046c1f3d
186 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a link farm, containing numerous external links to various domains, many of which are hosted on disposable or dynamic DNS services. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or SEO spam. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest it's designed to redirect users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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://druttle.ru/123?utm_term=hamelin+bay+fishing+report PDF link annotation
    • https://cdn.sqhk.co/dujovibipu/K3jeiO2/duwutopujumunivijijudiza.pdfIn PDF document text
    • https://xovewelokajefi.weebly.com/uploads/1/3/4/8/134864882/lakawanokenilezorug.pdfIn PDF document text
    • https://cdn.sqhk.co/larovejadeb/jdgVVje/cake_games_free_download.pdfIn PDF document text
    • http://zobabikox.medianewsonline.com/fuvijukafufakijinotofapa.pdfIn PDF document text
    • https://ramitafot.weebly.com/uploads/1/3/4/3/134340854/e6fa0c.pdfIn PDF document text
    • https://bekitatabegoze.weebly.com/uploads/1/3/0/7/130775701/busuporilulagobawal.pdfIn PDF document text
    • http://jekakesefetivap.22web.org/xifogojujapiwijijebulaz.pdfIn PDF document text
    • http://kawopewil.22web.org/letujomiber.pdfIn PDF document text
    • https://tajupifode.weebly.com/uploads/1/3/1/0/131070450/6b7f451.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nosigegu.onlinewebshop.net/niludatibovizoduxasiza.pdfIn PDF document text
    • https://7e005a1c-fb68-43c1-af83-b854b6a2d282.filesusr.com/ugd/dcfb95_443b63a27111457d946ffd5d56fd8d16.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zaxefemebidaz/are_there_any_haircut_places_open_near_me.pdfIn PDF document text
    • https://dedb376b-efc3-4528-ac10-fc65d12f866c.filesusr.com/ugd/5f6074_2888caf0bbf349f3a6df4e330c3cdab7.pdf?index=trueIn PDF document text
    • https://dfabac9c-3a78-4d86-b112-ccf1750024e9.filesusr.com/ugd/b46e2f_a2ba829768844100b0847d92e93e0abe.pdf?index=trueIn PDF document text
    • https://054d5c26-596f-48a3-87a7-0fc79031e5db.filesusr.com/ugd/599026_85abe59c182b44d8aa427fe285a28954.pdf?index=trueIn PDF document text
    • https://33c7e2ec-32fc-4676-a642-9d95a4379e01.filesusr.com/ugd/622218_e86172a31c8c444eb9cd9d1045ff9cb1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/waxegatulo/4182216816.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_off00010e36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E36 5516 bytes
SHA-256: 9785e647a286ab9fe772cb5f1a28a0e68f3d643fd68f09756f2d8e336c7ccbd6
font_01_sfnt_off000120d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120D6 11044 bytes
SHA-256: 2b2518954e05ae9e0b24a1897c1d5908ca2e53efcf02c7fad35c9b94eb6aec29
font_02_sfnt_off00014690.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14690 16092 bytes
SHA-256: ea75db71c9df7250347a03039f742fcd189f5fc3f08964e696816fa8b5227073