Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdcc40e43bf1f8a5…

MALICIOUS

PDF

78.3 KB Created: 2021-04-06 02:44:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: c0ffb2654e3ca4144b96a41e50be47a0 SHA-1: 75bf82033210e03b4b0eb914d063724e0060b7f9 SHA-256: fdcc40e43bf1f8a58203389c76de2aa91aa6924aa685a91ec6641cd914ad798a
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The primary URL, https://xezojetit.ru/123?utm_term=aila+re+video+song++malaal, is presented as a video song link to entice clicks. No scripts were extracted, but the PDF structure and numerous external links indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/123?utm_term=aila+re+video+song++malaal PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4408479/normal_5fcb21573939b.pdfIn PDF document text
    • https://zukaxopukij.weebly.com/uploads/1/3/1/1/131164552/9873200ad6a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478716/normal_602802db32113.pdfIn PDF document text
    • https://feropozu.weebly.com/uploads/1/3/1/4/131454035/5d1aaec4773c2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389387/normal_5ff79d5f7fca2.pdfIn PDF document text
    • https://gipebikurowa.weebly.com/uploads/1/3/4/0/134095939/viruredujivum_xavuvom_mipol_suputerumediwa.pdfIn PDF document text
    • https://numilobes.weebly.com/uploads/1/3/4/2/134235742/kagum.pdfIn PDF document text
    • https://piborubaladedos.weebly.com/uploads/1/3/4/7/134764427/zovuniwarebisadojuma.pdfIn PDF document text
    • https://ratopavitakam.weebly.com/uploads/1/3/4/4/134460251/24cfe4dc171dd4.pdfIn PDF document text
    • https://dejerolet.weebly.com/uploads/1/3/4/4/134444382/1877968.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458124/normal_605c5cce195c3.pdfIn PDF document text
    • https://tababara.weebly.com/uploads/1/3/0/7/130739165/nisirunowamajus.pdfIn PDF document text
    • http://siwuweragiv.iblogger.org/30495360358.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vogexigup.rf.gd/34085211974.pdfIn PDF document text
    • https://a6f18165-9bfd-46c9-8f51-0ab50cd0b687.filesusr.com/ugd/265c7a_d916ae0fa29b42ef9946f903df20ae8b.pdf?index=trueIn PDF document text
    • http://xadugatu.epizy.com/camera_360_apk_android.pdfIn PDF document text
    • https://s3.amazonaws.com/zuguvoxoki/luvogogozupelusem.pdfIn PDF document text
    • http://fidusigugowubo.epizy.com/java_programming_coding_interview_questions_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/baxadelefofibuz/jutixevuxut.pdfIn PDF document text
    • https://1ce8651a-bfbb-4b9a-b1bf-24b3b574775a.filesusr.com/ugd/ac72e0_20815d6675654ba48c3269c2da70f399.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fofeguj/lanoleviwarexo.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f298.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF298 5196 bytes
SHA-256: fa9136436c3d4f1853ff8f19ca80dce2644877035b7ebf06b29e085edcbd1677
font_01_sfnt_off00010433.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10433 11764 bytes
SHA-256: 2cfcf51632d3e135f73bc55316ef8605852c0c6812afa952b27845c4f84c9eff