Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b375a3b3333c6e5…

MALICIOUS

PDF

86.6 KB Created: 2021-04-30 10:48:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 10b626b00a8ad49ffb45742ecf7b3ecf SHA-1: 51f55781f8e2c1a1fa5bac9b06e53b18bd17b73e SHA-256: 9b375a3b3333c6e59dee5f8cca4944b9947630f4c3fd30869691841fa4c90246
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 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 external links are indicative of malicious redirection techniques.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://xezojetit.ru/strik?utm_term=social+learning+theory+psychology+definition PDF link annotation
    • http://penageli.getenjoyment.net/dorijavaler.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489251/normal_60479d0c4b5b3.pdfIn PDF document text
    • https://givodevivunafa.weebly.com/uploads/1/3/1/8/131871579/gedagun-mibirup-rizanapeleni-levevil.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376103/normal_5ff65c2b1afc3.pdfIn PDF document text
    • https://wopuwidutava.weebly.com/uploads/1/3/5/3/135322166/e5178efe64.pdfIn PDF document text
    • https://xavelimati.weebly.com/uploads/1/3/5/2/135298033/2286277.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382973/normal_60647944080fd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496005/normal_601b009337a6a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465012/normal_5fdbe96f50abb.pdfIn PDF document text
    • http://pakupuxojopef.getenjoyment.net/pdf_split_and_merge_offline_installer.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497110/normal_5fe4114881239.pdfIn PDF document text
    • https://dunawotota.weebly.com/uploads/1/3/1/4/131438316/belifunigu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445331/normal_603b06538141e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499979/normal_5fd1b507a3011.pdfIn PDF document text
    • http://modozadubop.mywebcommunity.org/temogurorokunimumezima.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4529149/normal_60287f5326e47.pdfIn PDF document text
    • https://xevavudexatowud.weebly.com/uploads/1/3/4/4/134401026/ec31f574042b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464303/normal_5fc71ec443cb4.pdfIn PDF document text
    • http://zivemigidefis.mypressonline.com/46979046346.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417141/normal_5fedf2d1eb4b6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489054/normal_5fce6ed317341.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gevapugono.atwebpages.com/telemecanique_altistart_48_user_manual.pdfIn PDF document text
    • http://lupixopuvir.onlinewebshop.net/arte_da_guerra_sun_tzu_frases.pdfIn PDF document text
    • http://dupepoge.onlinewebshop.net/introduction_energie_renouvelable.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00012fa6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x12FA6 18364 bytes
SHA-256: 2535364fbb3d148c019f9981ac000c3efe1a604a7e6d7e29ac86f4e254e63956
font_00_sfnt_off0000f55f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF55F 5620 bytes
SHA-256: 5d35cd2e4dbde471d0ffe99a5b35fc7a107484e9a637f420c901c3c74623455c
font_01_sfnt_off00010880.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10880 11620 bytes
SHA-256: 2d45bdd18c00e078417c3130c7918715aa26f750cf9c9095dca438c61adc7ecf

Open this report in the interactive analyzer, or submit your own file for analysis.