Malicious PDF — malware analysis report

Static analysis result for SHA-256 87850de6ca4aba32…

MALICIOUS

PDF

74.7 KB Created: 2021-02-24 18:00:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 1fdb9781eace5fda11773d7d96928087 SHA-1: 909060c9eb5603c3e9b0f134a94be20da05ceec5 SHA-256: 87850de6ca4aba3215dc347df34e3e44dca791d3a1ae3ec382f057203c75eecd
244 Risk Score

Malware Insights

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

This PDF file contains numerous embedded links pointing to external websites, many of which are hosted on disposable domains or known malicious redirectors. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' indicate a strong intent to direct users to potentially harmful content. While no scripts were explicitly extracted, the nature of the embedded links suggests a phishing or malware distribution attempt, likely leveraging a spearphishing attachment vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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.
  • 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://yafferge.ru/strik?utm_term=data+mining+software+and+applications In PDF document text
    • https://cdn.sqhk.co/kiribikiv/3hjhgjg/906623170.pdfIn PDF document text
    • https://cdn.sqhk.co/jagibuvat/jZ0geus/xodobemu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465249/normal_5feaf04ca0ec5.pdfIn PDF document text
    • https://baxugufidet.weebly.com/uploads/1/3/0/7/130776886/5113943.pdfIn PDF document text
    • https://gojatoxemoniro.weebly.com/uploads/1/3/4/8/134894745/fijiw_forajuxogonata_kukiku.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452376/normal_6027406d76622.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427821/normal_5fe4197d9ed37.pdfIn PDF document text
    • https://pafutidosuzov.weebly.com/uploads/1/3/5/9/135989867/powabo_metamefozinapul_wixivegiv.pdfIn PDF document text
    • https://duvutotan.weebly.com/uploads/1/3/0/7/130775700/a04f4bb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372707/normal_5fcf43bbaa7fa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470553/normal_6022919f6b97a.pdfIn PDF document text
    • https://molulodanewiv.weebly.com/uploads/1/3/1/6/131606256/tirin.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411512/normal_6020135c36d6a.pdfIn PDF document text
    • https://safalijig.weebly.com/uploads/1/3/1/0/131070993/3198462.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/jeworurowam/67753662517.pdfIn PDF document text
    • https://s3.amazonaws.com/dusubonifu/receptionist_resume_template_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jovekus/fiat_126_tuning_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/xaliwalufoguni/85515684985.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_off0000e674.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE674 5564 bytes
SHA-256: 9f0db7bffe94d5ef99180974146c0b21c8f8330936334159fe996bdde0bc5114
font_01_sfnt_off0000f96b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF96B 10676 bytes
SHA-256: 625bf7be11ceb89123b2454cef9dc179b0b66b637dbea7e190ccf96b804fd0fb

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