Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbd55cddc5e9cd0a…

MALICIOUS

PDF

83.3 KB Created: 2021-03-02 07:33:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 229131e5df5f4073236b0a9c82087bbd SHA-1: 7a6c2493c1fba4ec4dba49b2578644392ba946d3 SHA-256: bbd55cddc5e9cd0af409abf558ba8393c2ccfcc48541ca0c774cf54d3d6e96ff
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external URIs, many of which are hosted on disposable domains and appear to be part of a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous URLs suggest it's designed to lead the user to a compromised site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jumiwimov.ru/strik?utm_term=what+does+30+mbps+mean PDF link annotation
    • http://b0xberry.online/risaxixigusewijulai7cev.pdfIn PDF document text
    • http://fortysgjdk.fun/anthropological_linguistics6qtjj.pdfIn PDF document text
    • http://wapividazofar.scienceontheweb.net/clr_via_c_2019.pdfIn PDF document text
    • http://mir23.xyz/zombie_apocalypse_2_unblocked_hackedten9r.pdfIn PDF document text
    • https://xumabilere.weebly.com/uploads/1/3/1/1/131163638/josopobinuzisimifeda.pdfIn PDF document text
    • http://xuvaxujogilo.mygamesonline.org/read_the_excerpt_from_ralph_waldo_emersons_self_reliance_these_are_the_voices.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384304/normal_5fe0ffdc19efe.pdfIn PDF document text
    • http://koxelovanalimu.getenjoyment.net/universal_audio_apollo_twin_mkii_duo_review.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410956/normal_6022bab37fbdb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492240/normal_5ff7f4a5e27a4.pdfIn PDF document text
    • http://rusewigojubilon.mygamesonline.org/5341334440.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401515/normal_6027a18f43fb7.pdfIn PDF document text
    • http://magnetfix.store/donefozosurar754xe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393362/normal_601d24a0b9051.pdfIn PDF document text
    • http://otshelnik.net/jopuborubo4yq.pdfIn PDF document text
    • http://cozyplacefor.rest/588702390497fqt7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480145/normal_5fc8b9af9dd33.pdfIn PDF document text
    • http://navaram.online/17420916394erlhb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB70 4664 bytes
SHA-256: 02dd88fa26c754bf0589dbe2c7bc248e24b78f8b520b8076213a28da4372bb16
font_01_sfnt_off0000fb9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB9D 5272 bytes
SHA-256: 1b70ecad836a893ac9911b73bc0610ad8bac428d74a4d5ab61666e93da8973e9
font_02_sfnt_off00010d5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D5C 10604 bytes
SHA-256: 47f69190038e30ed3f230d490ffde14c8ca470c0c0a458ddc3a0a8393cb44b37
font_03_sfnt_off000131ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131AD 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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