Malicious PDF — malware analysis report

Static analysis result for SHA-256 7670a31fb738e626…

MALICIOUS

PDF

86.4 KB Created: 2021-04-29 22:48:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 95e98298e52b60cd3742b489fde23866 SHA-1: 29934cf585a36d7dc487d95ad72423aaaa4dba21 SHA-256: 7670a31fb738e6260df066d2f2b44453b43f3c1b3bc6364eb2224dfc6740079a
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a technique often used in phishing or SEO spam campaigns to redirect users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The presence of embedded URLs and the overall structure suggest an attempt to exploit users by directing them to potentially harmful content.

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
  • 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.
  • 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://lozipotod.ru/strik?utm_term=what+are+the+political+parties+before+independence PDF link annotation
    • https://togutugu.weebly.com/uploads/1/3/4/6/134617883/xulatimib-vajujenanomup.pdfIn PDF document text
    • http://kudusakepupa.sportsontheweb.net/13283572191.pdfIn PDF document text
    • https://konevumi.weebly.com/uploads/1/3/4/3/134399330/1488424.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370778/normal_600563c5667c2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385009/normal_602d3b63378e6.pdfIn PDF document text
    • http://womizepivilora.sportsontheweb.net/enhanced_batch_file_programming.pdfIn PDF document text
    • http://tanijijud.sportsontheweb.net/cuanto_es_2_pulgadas_en_milimetros.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448115/normal_5fd5ffefdb9d7.pdfIn PDF document text
    • http://wodedutipif.medianewsonline.com/why_did_my_thermostat_go_blank.pdfIn PDF document text
    • http://tedurelaseji.mygamesonline.org/gesavowu.pdfIn PDF document text
    • https://kuvijoxujav.weebly.com/uploads/1/3/4/2/134266993/xovufa.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/xoferuzu/85697647103.pdfIn PDF document text
    • https://s3.amazonaws.com/zamemigojat/48734589138.pdfIn PDF document text
    • https://s3.amazonaws.com/lebaxa/lilimiresujixila.pdfIn PDF document text
    • https://s3.amazonaws.com/fokapikow/jquery._ajax_example_form_submit.pdfIn PDF document text
    • http://binuwuzipu.myartsonline.com/49639695297.pdfIn PDF document text
    • https://s3.amazonaws.com/divexikav/space_planning_in_interior_design.pdfIn PDF document text
    • http://dogiwexor.myartsonline.com/history_of_english_literature_by_t_singh_download.pdfIn PDF document text
    • http://saluwagasa.onlinewebshop.net/mugapavajimo.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_off00011390.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11390 5396 bytes
SHA-256: 1d40a61cd60a8868a7e3fc92c99468ec148037a4d587194750a67549fd31baad
font_01_sfnt_off000125e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125E6 11216 bytes
SHA-256: c036280b1eb5494e20370a41f887029917493e7fc82887e49af981298df948ae

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