Malicious PDF — malware analysis report

Static analysis result for SHA-256 c50776c0a94321e5…

MALICIOUS

PDF

72.9 KB Created: 2021-02-28 16:52:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 5171513bbddaf8286a9aad5914320141 SHA-1: fa4d8c08a24ee0076b9cd6ddabcae388de88de91 SHA-256: c50776c0a94321e56b165a54ca0a0f9418dd53cfc831236199c5003c192d7617
186 Risk Score

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://leonvi.ru/wix?keyword=alton+brown+marshmallows PDF link annotation
    • https://wezenazuzive.weebly.com/uploads/1/3/4/7/134764498/8326987.pdfIn PDF document text
    • https://fowinojosusine.weebly.com/uploads/1/3/4/4/134495991/2065809.pdfIn PDF document text
    • https://mefupajudeto.weebly.com/uploads/1/3/4/8/134883840/17f086602.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372373/normal_5fdbdbc79d03d.pdfIn PDF document text
    • https://peminikagi.weebly.com/uploads/1/3/1/8/131856713/daleda.pdfIn PDF document text
    • http://latuha.com/loxosivuwoxamamufatunis4yctg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459936/normal_6030d31492a3c.pdfIn PDF document text
    • http://save50.pro/microbial_assay_of_antibioticsb2jj6.pdfIn PDF document text
    • https://rabifupokuwu.weebly.com/uploads/1/3/1/1/131164250/tevipexago.pdfIn PDF document text
    • http://fepotarugagi.22web.org/bose_quietcontrol_30_user_guide.pdfIn PDF document text
    • https://tinozewadewuxa.weebly.com/uploads/1/3/1/3/131398338/2786775.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wagenugeti.epizy.com/what_is_the_best_folding_treadmill_for_home_use.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_off0000e318.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE318 5148 bytes
SHA-256: 0d92c0f157692b0ffa03ee0c81f0af9450749a30b6bd8ff0ea67eebcf45dd19a
font_01_sfnt_off0000f476.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF476 10080 bytes
SHA-256: b16bb1dfd48dcad0e34d5cbe497f86a915e9eabd6fe7851d172d8dfb2fe6b216