Malicious PDF — malware analysis report

Static analysis result for SHA-256 69f0d2ac39b02be2…

MALICIOUS

PDF

80.7 KB Created: 2021-02-27 07:14:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: c2af893863fe059faa02235c45d06968 SHA-1: b3ca1dfb4db25fe33d5f1438ae893d93c566cbe8 SHA-256: 69f0d2ac39b02be24632dc2bed7605d31a314f21569c5af5afab595529b8eb2e
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan. It contains numerous external links, many pointing to PDF files hosted on suspicious domains, indicative of a link farm or SEO poisoning attack. The embedded URLs suggest an attempt to redirect users to malicious content or phishing sites.

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://vilenefex.ru/wix?keyword=exerpeutic+5000+elliptical+manual PDF link annotation
    • http://xejomukeg.22web.org/21499446721.pdfIn PDF document text
    • http://barivelovone.22web.org/19100484076.pdfIn PDF document text
    • http://xafukuxovikovu.22web.org/77711156034.pdfIn PDF document text
    • http://nickned.me/after_effect_template_photo_slideshow7ibhl.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406463/normal_6033701244f06.pdfIn PDF document text
    • https://revugegan.weebly.com/uploads/1/3/4/6/134682990/7130058.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://potaxekegeze.rf.gd/8495053407.pdfIn PDF document text
    • http://butazajoru.rf.gd/51883108950.pdfIn PDF document text
    • https://s3.amazonaws.com/wovedukevikov/rafinejuken.pdfIn PDF document text
    • http://gugefojekasarul.epizy.com/tencent_gaming_buddy_apk_free.pdfIn PDF document text
    • https://s3.amazonaws.com/posufij/shahid_app_for_samsung_smart_tv.pdfIn PDF document text
    • https://s3.amazonaws.com/gonima/guleramorofudemabesodejev.pdfIn PDF document text
    • https://s3.amazonaws.com/sezewu/13208693619.pdfIn PDF document text
    • http://sodapatuvunivuj.epizy.com/lange_qa_psychiatry_11th_edition.pdfIn PDF document text
    • http://tejusadesivuti.epizy.com/12519567140.pdfIn PDF document text
    • https://s3.amazonaws.com/zisulamisozoto/treatment_guidelines_for_metastatic_renal_cell_carcinoma.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_off0000fe57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE57 5192 bytes
SHA-256: d0d607459f46814c48566ea31c015216265a6ecd843f1f4c59c6ae5f7824d229
font_01_sfnt_off00010ff9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FF9 10980 bytes
SHA-256: c2b7cffbfb88161ee8d640185d2e5d955ac1aec41d1070fad4b048d5a607cd0d

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