Malicious PDF — malware analysis report

Static analysis result for SHA-256 acb4edb85ffb8aa8…

MALICIOUS

PDF

82.0 KB Created: 2021-03-07 03:19:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 2c1f2537bca766d28047eef4c83869d8 SHA-1: 3a5ca51ed893a2dcb8643ee5a650e1989c4050c2 SHA-256: acb4edb85ffb8aa8153b5e2e00be7ce8c2c045728e87c1404f7cf8c7c60fdd36
126 Risk Score

Malware Insights

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

The PDF file contains a heuristic indicating it is a link farm on disposable hosting, and an embedded URI pointing to a URL associated with downloading 'lucky patcher apk'. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the embedded URI is the primary indicator of the attack pattern.

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/wix?keyword=download+lucky+patcher+apk+terbaru+tanpa+root PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4497095/normal_5fc85fba06c83.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408593/normal_603c40e1833b2.pdfIn PDF document text
    • http://zexaribamemavi.sportsontheweb.net/19898801211.pdfIn PDF document text
    • http://ziximotizaned.medianewsonline.com/15449894971.pdfIn PDF document text
    • http://jenerotisa.mywebcommunity.org/46215542353.pdfIn PDF document text
    • http://lakuberik.mywebcommunity.org/nanipabo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402956/normal_5ffba1fc92588.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366341/normal_6005116fe8622.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457570/normal_60362e696499f.pdfIn PDF document text
    • http://molosorew.iblogger.org/3502675506.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
    • https://uploads.strikinglycdn.com/files/dc39aad2-d1c9-48ed-8f20-187771b3d524/xuramodimuvikoxetawovodo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ef4ad4a-c7f7-4aa4-9b30-eda767ddfbc4/how_do_you_get_rid_of_back_pain_during_your_period.pdfIn PDF document text
    • http://fuwotatikiluwa.epizy.com/mutawopumiwiwid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/894e3b37-a883-4b38-a86e-caadac6ca7dd/83188741524.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a3395bc-1e47-4b63-9322-6846c01b3b18/sat_test_dates_and_locations_2021.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2df45113-3d2d-4aca-b473-ca6268edf8ef/fusodegigesosiz.pdfIn PDF document text
    • http://megigezorozo.atwebpages.com/pinojudomose.pdfIn PDF document text
    • http://baxewape.myartsonline.com/dojasumuv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4854fbb-2953-4a24-a103-0670201fc505/kekovexidokupo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/149c7d75-bec3-4175-a8be-d1bea1e9ae67/smith_and_wesson_model_915_9mm_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/074a9f44-481b-450b-aac7-a277a213eb38/20948193134.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f5f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5F9 5212 bytes
SHA-256: 76224b7834a4054ecc49900fe6459e41005397e146fac382058434658be69c24
font_01_sfnt_off000107ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107BA 10512 bytes
SHA-256: 802b5c37cde80927e0b9ac4fda9e30b843fffbcd8d7b7b35a81aaca3ea16f500
font_02_sfnt_off00012bb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BB3 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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