Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb8feec873e9b27e…

MALICIOUS

PDF

67.4 KB Created: 2021-03-04 23:24:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 7847943eed55fb220202b9b92096a60d SHA-1: 643beedb02680ab7c65b774134a7fdc532ea1641 SHA-256: fb8feec873e9b27eb58275f528a94ab52b8bcd7cc52fc634bc3076f687e55dba
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous embedded URLs, with one specifically pointing to a suspicious domain ('xajibur.ru') that is likely part of a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious 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 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://xajibur.ru/aws?utm_term=1988+evinrude+9.9+parts+diagram PDF link annotation
    • http://kojazunupetip.mygamesonline.org/35499904312.pdfIn PDF document text
    • http://zuregazezoral.mygamesonline.org/dorumurorepefu.pdfIn PDF document text
    • http://zoxuruje.sportsontheweb.net/4687722021.pdfIn PDF document text
    • http://matroskin.space/junelewedowegipifcp73m.pdfIn PDF document text
    • http://uorott.com/reporter_news_live_malayalam_todaysa0r5.pdfIn PDF document text
    • http://eferevole.com/hp_w2071d_monitor_problemsk481p.pdfIn PDF document text
    • http://pemufosapakem.mypressonline.com/jio_mobile_video_calling_baat_karne_wala_apps.pdfIn PDF document text
    • http://fresh-ita.space/437213208823op31.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/4278feed-4ddb-47b8-926b-27610c2f766f/lixabigetipuzodi.pdfIn PDF document text
    • https://s3.amazonaws.com/fapaga/dedawisuvize.pdfIn PDF document text
    • http://xomapagovujux.atwebpages.com/fisagasa.pdfIn PDF document text
    • https://bc5ba30c-e427-49eb-abc4-9677f18f04c1.filesusr.com/ugd/bcd086_b615a13eb79647eca667070190b961ce.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fisulefajow/gigiliwenerigedugalibaw.pdfIn PDF document text
    • https://s3.amazonaws.com/zagubip/55615309816.pdfIn PDF document text
    • https://9e2bb560-353e-4f5d-a08b-1363560edab4.filesusr.com/ugd/6c032c_2668947eeee1488c8a3256b437067993.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/05a50ad5-b812-469a-aabf-7ed17510096b/center_point_scope_4-16x40.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_off0000c9c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9C8 5644 bytes
SHA-256: cebf74cfc6c9e82d0021c561b3b322d1fc4326eed2045344eb10af5c837b88db
font_01_sfnt_off0000dcf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCF7 10472 bytes
SHA-256: c6a4da5367c6e33fe182f6f656f0dd9d0d3dea6aa478417df9e9fd6c988d27b5

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