Malicious PDF — malware analysis report

Static analysis result for SHA-256 65467dca02350807…

MALICIOUS

PDF

61.6 KB Created: 2020-11-26 13:02:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: db71102eb33b01bf85c4b7f8acbe6152 SHA-1: 17aa87a68b6fb1d583c9a7d685a2e015196ede21 SHA-256: 65467dca02350807e7ee161f8fd2a2816d0220f3221c352ad200df6d53ef6175
252 Risk Score

Malware Insights

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

This PDF file exhibits malicious characteristics, including linking to known malicious redirector infrastructure and hosting a large number of external PDF links, many on disposable domains. The presence of a 'download' lure further supports a malicious intent, likely to trick users into downloading malware. The ClamAV detection and ML classifier also strongly indicate maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://traffmen.ru/strik?utm_term=dragon+city+apk+mod+free+download In PDF document text
    • https://tulebowad.weebly.com/uploads/1/3/4/4/134467329/wowakogusibinif.pdfIn PDF document text
    • https://xavoxoxuda.weebly.com/uploads/1/3/1/3/131379246/b31b2c.pdfIn PDF document text
    • https://xazojitov.weebly.com/uploads/1/3/1/4/131408465/6866536.pdfIn PDF document text
    • https://kavanezeso.weebly.com/uploads/1/3/4/4/134477356/5a4763.pdfIn PDF document text
    • https://moxalabukeziro.weebly.com/uploads/1/3/4/7/134772199/135193.pdfIn PDF document text
    • https://vedabigejiko.weebly.com/uploads/1/3/1/4/131438046/9660098.pdfIn PDF document text
    • https://vevifogenumij.weebly.com/uploads/1/3/4/6/134626850/luwetojo-lavenefujalo-ridowijuzomagoj.pdfIn PDF document text
    • https://tivowigelatel.weebly.com/uploads/1/3/4/4/134495783/savapelapitutex-xifitad-xemaze.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/tapexiw/xazasoremupiwifejog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/508bd84f-8f2d-4bab-a1e4-68f3719b1e7c/51556669915.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab0d2e4b-bfa2-4a09-99df-43ec6d3dfe7f/xivirejikuze.pdfIn PDF document text
    • https://s3.amazonaws.com/kasuwevovog/java_spring_resttemplate_thread_safe.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_off0000b6f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB6F9 5556 bytes
SHA-256: dd6175a3f4a27a5f9d3850b3519f7604e984c3f23e887c125d3bff35be0485b3
font_01_sfnt_off0000c9f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9F5 9344 bytes
SHA-256: 019be0061fdcb5c6256b6fa03f88d618c63da0572e2e6a5503ce2ef696c4b524

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