Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca9f0ac288e11a4b…

MALICIOUS

PDF

71.2 KB Created: 2021-02-23 16:49:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 90144094ba88f9bf611f4c4a035aa9f5 SHA-1: 27895efac0297e288a5b1135b4f6ad2a520340b6 SHA-256: ca9f0ac288e11a4b5d2a3d6950e659ea0b61027866e7f5837dd1da2cda3d4ca6
186 Risk Score

Malware Insights

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

The PDF document contains a link farm with numerous external links, many hosted on disposable domains, suggesting a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious lure.

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://druttle.ru/strik?utm_term=what+is+the+first+deadly+sin+in+the+bible PDF link annotation
    • https://cdn.sqhk.co/nuxudopusot/1GhjLhi/ddpai_dash_cam_mini_wifi_1080p_dash_camera.pdfIn PDF document text
    • https://sevisexabokiro.weebly.com/uploads/1/3/1/6/131637038/jipesiridifujiz.pdfIn PDF document text
    • https://cdn.sqhk.co/wubunepan/eRihjjA/24656598677.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423154/normal_601dba2844a63.pdfIn PDF document text
    • https://cdn.sqhk.co/tenalewi/mTrgiqo/leo_dictionary_spanish_english.pdfIn PDF document text
    • https://cdn.sqhk.co/turanexode/gixgdjc/74030752384.pdfIn PDF document text
    • https://zitadinenere.weebly.com/uploads/1/3/1/8/131871439/wexubovawizikaw-gufomaxerevexo.pdfIn PDF document text
    • https://pidufemimin.weebly.com/uploads/1/3/6/0/136054052/gifimujaf.pdfIn PDF document text
    • https://wefigoga.weebly.com/uploads/1/3/4/0/134041661/1192272.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482218/normal_5fe05bbb34ddf.pdfIn PDF document text
    • https://cdn.sqhk.co/vefapatape/fjhjjBP/bubererojapazuduloludaki.pdfIn PDF document text
    • https://judenebubiz.weebly.com/uploads/1/3/4/6/134656374/fibemako.pdfIn PDF document text
    • http://xupoluwifokolo.22web.org/when_does_zaxbys_start_hiring.pdfIn PDF document text
    • http://xumegexujarev.22web.org/39508642356.pdfIn PDF document text
    • http://fotogodopuxet.iblogger.org/bibliography_in_harvard_reference_format.pdfIn PDF document text
    • http://likujamozajowu.22web.org/57001025258.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bumilamufitilu.epizy.com/65709086074.pdfIn PDF document text
    • http://konazosite.epizy.com/vazisanerekazuzusokolal.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_off0000d7f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7F3 5248 bytes
SHA-256: 1b570221966a000bdd4f5b7f119c3ee1a0dcaf89d23d21367d937b2d3eb21579
font_01_sfnt_off0000e9da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9DA 11008 bytes
SHA-256: 8017a39b30d9e8b460a1f039841a3f594a646f1c4ce7f9955dfd7cf7958cbe02

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