Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fbe0d26f750ca3a…

MALICIOUS

PDF

75.8 KB Created: 2021-02-27 22:34:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 333074f94f72581e09736ee1359e8663 SHA-1: d094edef3d21c96f180c48e9ef766f4fa0698d0e SHA-256: 4fbe0d26f750ca3a44363811b6be4e9f264d64641144877a1ed4b7ae89dc4056
206 Risk Score

Malware Insights

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

This PDF document contains a significant number of external links, identified as a link farm. The presence of multiple unknown URLs and a ClamAV detection strongly suggests malicious intent, likely for SEO manipulation or to redirect users to phishing or malware hosting sites. While no scripts were directly extracted, the PDF structure and numerous external URIs indicate a pattern of malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://golowaki.ru/strik?utm_term=flashing+f+on+sunbeam+electric+blanket PDF link annotation
    • http://getporte.xyz/jexexojetukagokedowkb10a.pdfIn PDF document text
    • https://jebasiju.weebly.com/uploads/1/3/1/3/131381450/9879487.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464524/normal_60190240e85ff.pdfIn PDF document text
    • https://delidago.weebly.com/uploads/1/3/0/9/130969485/tupuzaxapumileveli.pdfIn PDF document text
    • http://tufofol.medianewsonline.com/how_to_replace_garage_door_remote_battery.pdfIn PDF document text
    • https://sawamamuwez.weebly.com/uploads/1/3/5/9/135992332/8035584.pdfIn PDF document text
    • https://zibefaxad.weebly.com/uploads/1/3/4/5/134594794/36240818b.pdfIn PDF document text
    • http://lapitubemexidi.mywebcommunity.org/anker_bluetooth_keyboard_pairing_code.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470821/normal_5fc7f6f8bd8ad.pdfIn PDF document text
    • http://gebuhrenfrei-mein.com/11943406737c158.pdfIn PDF document text
    • https://fidesafova.weebly.com/uploads/1/3/4/8/134876701/vinekipu.pdfIn PDF document text
    • https://nefakemibozike.weebly.com/uploads/1/3/5/3/135314079/numoboro.pdfIn PDF document text
    • http://bonifacy.site/29971547383d6g7a.pdfIn PDF document text
    • http://jobware.pro/6680709730l6er6.pdfIn PDF document text
    • https://munibejexa.weebly.com/uploads/1/3/1/4/131414516/37a6fa1f8.pdfIn PDF document text
    • http://insta-sale.site/velurupd56i.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/wefadep/line_plot_worksheets_5th_grade.pdfIn PDF document text
    • http://sogivuwe.onlinewebshop.net/xaxixumofazibufat.pdfIn PDF document text
    • http://radiviwix.onlinewebshop.net/84546457311.pdfIn PDF document text
    • http://zisukuvi.atwebpages.com/how_to_be_a_great_public_relations_officer.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_off0000ea0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA0C 5452 bytes
SHA-256: 223f69e55ce448eaf91141ec34883d408d5808ef965d17052659b48013617793
font_01_sfnt_off0000fc72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC72 10888 bytes
SHA-256: bf8c7b582da6108181e91e3721d587548edb99d4b19073d0bfdf3f22cd9f8e1f

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