Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bff1441ca8e3b30…

MALICIOUS

PDF

71.6 KB Created: 2021-02-22 23:17:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: bf2bc1b4de681f532459772e338ade3b SHA-1: b200368c9cbed31868853d6e9b70c228dd055c75 SHA-256: 6bff1441ca8e3b3081a73698fbff26622f8d553bf18dbd6236c8854898419284
214 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics, including a critical finding for linking to known malicious redirector infrastructure. The presence of a large number of external PDF links suggests a link farm or SEO manipulation tactic, potentially leading to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/strik?utm_term=a+suitable+boy+acorn+tv+review In PDF document text
    • https://static.s123-cdn-static.com/uploads/4420600/normal_5ff442624dca2.pdfIn PDF document text
    • https://kegegofelev.weebly.com/uploads/1/3/2/6/132681159/5333885.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392861/normal_6032052fc70d5.pdfIn PDF document text
    • https://venozosuvizulul.weebly.com/uploads/1/3/0/8/130814909/kemegivos.pdfIn PDF document text
    • https://gasimela.weebly.com/uploads/1/3/1/3/131398285/bilitutuw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447278/normal_60155663e2700.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478141/normal_6004ff4a0f588.pdfIn PDF document text
    • https://tiwebusimevadeb.weebly.com/uploads/1/3/5/3/135346158/kiratav_lojigoxip_kamowudo.pdfIn PDF document text
    • https://mufusudakewita.weebly.com/uploads/1/3/2/6/132681672/d68d635131300.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zulezov/ziripefigifewimaleruwoju.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxawetawupo/pdfminer.types.notimplementederror_unsupported_filter_ccittfaxdecode.pdfIn PDF document text
    • https://s3.amazonaws.com/kujesulad/zen_and_the_art_of_happiness_audiobook.pdfIn PDF document text
    • http://sarozaxag.epizy.com/australia_shark_news_report.pdfIn PDF document text
    • https://s3.amazonaws.com/rebomedug/camera_raw_filter_software.pdfIn PDF document text
    • https://s3.amazonaws.com/kefodek/xazekexam.pdfIn PDF document text
    • http://loxosufodu.epizy.com/42864140242.pdfIn PDF document text
    • https://s3.amazonaws.com/gopuze/integer_word_problems_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/fowikorejodi/bugsplat._dll_free_64_bit.pdfIn PDF document text
    • https://s3.amazonaws.com/lolaritemukole/lijaz.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_off0000d9eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9EB 5176 bytes
SHA-256: 85d840a212a4b9d87d091bd3a7ef00ec0d94eaaf14c8c4440e2d5a9d7696f700
font_01_sfnt_off0000ebb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBB1 10988 bytes
SHA-256: d12f37fb0e0b1f750f1d287ad59b02f8272de2aa8b6b0c62f134af551ac8569f

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