Malicious PDF — malware analysis report

Static analysis result for SHA-256 65ff1d9f6b5747b9…

MALICIOUS

PDF

93.1 KB Created: 2021-05-28 22:19:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 5740e5a2de0e8daf1ece62e352acd6ef SHA-1: fce9d66e595c14e7dc29e3b187ea730ac5438f65 SHA-256: 65ff1d9f6b5747b95a6411d8c080f4fc0d61b9727d0b5c3eb24c60877fed471a
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm intended to manipulate search engine results or direct users to malicious sites. The primary malicious URL identified is 'https://soxebez.ru/strik?utm_term=playstation+5+restock+2021+canada', which is likely a phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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 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://soxebez.ru/strik?utm_term=playstation+5+restock+2021+canada PDF link annotation
    • https://taxezuwijukiwum.weebly.com/uploads/1/3/1/6/131606901/df3d3d10b8d51f3.pdfIn PDF document text
    • https://kibimibenafozo.weebly.com/uploads/1/3/5/9/135979164/zajopolog.pdfIn PDF document text
    • https://bibikabefome.weebly.com/uploads/1/3/5/3/135392895/4487568.pdfIn PDF document text
    • https://pikivazok.weebly.com/uploads/1/3/0/8/130873779/5920086.pdfIn PDF document text
    • https://jatilupek.weebly.com/uploads/1/3/4/4/134491857/7119777.pdfIn PDF document text
    • https://tuxenovizomojow.weebly.com/uploads/1/3/7/5/137516496/tariretuj_xodigikibib.pdfIn PDF document text
    • https://vatozuserivowi.weebly.com/uploads/1/3/4/3/134385792/3599850.pdfIn PDF document text
    • https://sawajarenemobo.weebly.com/uploads/1/3/4/4/134494328/wozafotozud_pabamaloxe_gefelino.pdfIn PDF document text
    • https://soxokelu.weebly.com/uploads/1/3/4/4/134494323/87ed318a7e1304.pdfIn PDF document text
    • https://nekemefewebewon.weebly.com/uploads/1/3/7/5/137504470/zilubonipex.pdfIn PDF document text
    • https://lasajiboz.weebly.com/uploads/1/3/1/3/131379041/7d22909f.pdfIn PDF document text
    • https://voliguxuzewiwa.weebly.com/uploads/1/3/4/7/134762967/vapowekogep-xukodimuzeve-nosewevurexi-wovarilanu.pdfIn PDF document text
    • https://vujebitaj.weebly.com/uploads/1/3/4/7/134759162/xagukosiwe.pdfIn PDF document text
    • https://gogijufiwadika.weebly.com/uploads/1/3/4/5/134581681/monofitoze.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f14379d-b95a-44f7-8f70-5048e4474be7/what_are_the_six_most_common_elements_in_living_organisms.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8dd4c117-21fe-4111-b924-f4186a12554e/canon_powershot_sd1200_is_charger.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8214492b-ec9f-4ce0-ab44-9b150489f47d/visaxarixujigoxil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9b5977f-9fd2-4b58-807e-80c0633f9cbb/20374490311.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d169d241-f304-4817-9ca3-c39c5870d433/64477793962.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC8D 5552 bytes
SHA-256: 29263696ebb6d993078090c7a93eb2330bf23f342198f272e9c9e2da3403ff35
font_01_sfnt_off00010f8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F8B 7480 bytes
SHA-256: b4e84d519b613f5552f8d19f9e5e47f7b980a3e5a19d834881a481be8a4303f1
font_02_sfnt_off000123f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123F6 12372 bytes
SHA-256: 6ef6b1a454c8fa6b33c1d2fd9d20e110b3af15cfd58aff04577905189728e58e
font_03_sfnt_off00014d37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D37 16796 bytes
SHA-256: 589085497afef14c02f539e7ac74e990270c091c46cb0e8058238bcf4ca90d45