Malicious PDF — malware analysis report

Static analysis result for SHA-256 27315596e05cdb91…

MALICIOUS

PDF

82.4 KB Created: 2021-02-08 18:27:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 6fe5c9d2a71269c384467f184b62a21c SHA-1: e9cc9877e5dc496b846d6675d7e35d99196a87ba SHA-256: 27315596e05cdb91296733de804578e5b8c4c14353936ccbce4b3992aff663be
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery. While no scripts were explicitly extracted, the PDF structure and numerous external URIs are indicative of techniques used to lure users to malicious sites.

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/aws?utm_term=pokemon+sun+ditto+breeding+guide PDF link annotation
    • https://gusotefatimadi.weebly.com/uploads/1/3/1/6/131636747/leweperonuxubu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4527345/normal_5ff5621947cb3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368750/normal_5fd8fa3c0e387.pdfIn PDF document text
    • https://berizezemimuto.weebly.com/uploads/1/3/2/6/132695806/botoniwojuge.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447271/normal_5ff42a21f0b8a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388841/normal_600c03fe120d9.pdfIn PDF document text
    • https://wexemexaxixu.weebly.com/uploads/1/3/4/7/134709907/funel.pdfIn PDF document text
    • https://kaginugopaz.weebly.com/uploads/1/3/4/3/134310825/dixiwezusogel.pdfIn PDF document text
    • https://wosapinilesodiw.weebly.com/uploads/1/3/5/3/135347506/nuraziwipivovok_woviparasak_wagad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458163/normal_5fd66f2742913.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422918/normal_600a118e8f582.pdfIn PDF document text
    • https://subijiderekura.weebly.com/uploads/1/3/4/6/134616270/7f60e405f.pdfIn PDF document text
    • https://dufamapa.weebly.com/uploads/1/3/4/3/134399252/lomojumuxu.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/wexukufedepim/log_book_template_south_africa.pdfIn PDF document text
    • https://s3.amazonaws.com/muvevanepen/xujoreb.pdfIn PDF document text
    • https://s3.amazonaws.com/dozuga/cet_form_2019_last_date.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f04c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF04C 5108 bytes
SHA-256: 100dde4babba48841abb5494ceb846de4ee2823e4a2b6bd523e1d54aaafef667
font_01_sfnt_off00010198.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10198 10924 bytes
SHA-256: 0c612330a07ed5e50a807f696007928b627a3faccabe07f3eafd431eed4f71c9
font_02_sfnt_off000126e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126E5 16144 bytes
SHA-256: d2d14ee152591f1391b9c182731dc81228c2f3de4d706c9bd7d93c14ae925181

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