Malicious PDF — malware analysis report

Static analysis result for SHA-256 3319a945c1efa1b3…

MALICIOUS

PDF

71.7 KB Created: 2021-02-22 03:36:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 010d80f54b905f5f33a3c88d619b4363 SHA-1: 0559f08b0ed33aa2902b833924852b7f7fbdc26f SHA-256: 3319a945c1efa1b38e6206bf889381c3330a61254f4b4285b93639bb8282f8bc
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URLs, such as 'https://jottigo.ru/strik?utm_term=braun+oral-b+triumph+professional+care+7000+d36.555', are likely used to redirect users to malicious sites for credential harvesting or further malware delivery.

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
  • 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://jottigo.ru/strik?utm_term=braun+oral-b+triumph+professional+care+7000+d36.555 PDF link annotation
    • https://cdn.sqhk.co/xinulezebi/hfcgjjg/78108179075.pdfIn PDF document text
    • https://xefakiradu.weebly.com/uploads/1/3/1/8/131856624/kerojezesapivotudod.pdfIn PDF document text
    • https://kabigupux.weebly.com/uploads/1/3/4/4/134442156/xetafawawesavep.pdfIn PDF document text
    • http://jumpfs.space/83370789706rbtnb.pdfIn PDF document text
    • https://lamipakowoj.weebly.com/uploads/1/3/2/8/132814468/2003232.pdfIn PDF document text
    • https://cdn.sqhk.co/nowovadizeb/gcichfA/89529600101.pdfIn PDF document text
    • https://tokarakuwo.weebly.com/uploads/1/3/0/9/130969339/gumitiloloxiwu.pdfIn PDF document text
    • https://cdn.sqhk.co/midijanere/ijjidhb/i_love_crosswords_3_level_4_answers.pdfIn PDF document text
    • https://korudodigujoko.weebly.com/uploads/1/3/0/7/130740169/6848370.pdfIn PDF document text
    • https://vevatujiv.weebly.com/uploads/1/3/1/4/131482893/gobanagewegar.pdfIn PDF document text
    • https://cdn.sqhk.co/pofaxiniraz/jdgjDia/dope_wallpaper_hd_app.pdfIn PDF document text
    • https://xifofenanupov.weebly.com/uploads/1/3/4/8/134857182/3193241.pdfIn PDF document text
    • https://lelopotive.weebly.com/uploads/1/3/0/7/130738546/6016488.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/zaxawetawupo/zagodedozopotufazafuxo.pdfIn PDF document text
    • https://s3.amazonaws.com/lulelepese/dakimiliwumedonevimogi.pdfIn PDF document text
    • https://s3.amazonaws.com/vuliwisuwig/90857481102.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_off0000d5ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5AE 6312 bytes
SHA-256: 5d67d6605b2bd4782dbf4c27181043c7e29825da49b48be2a838e0f4798556a3
font_01_sfnt_off0000eb07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB07 10644 bytes
SHA-256: c4a457f11a5aa3c396e12813df25ecc6b7fe248ba41a0b5a11c5763c2dcea95e

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