Malicious PDF — malware analysis report

Static analysis result for SHA-256 bde00e28951166cf…

MALICIOUS

PDF

77.6 KB Created: 2021-05-20 10:50:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 6f94aa342fbb1c401f4901401697dfa2 SHA-1: e0b755eb417a2201613eb39548a6e5d4fc8ecf43 SHA-256: bde00e28951166cff05f7ba6fe9dba4aa692ccf3f701a3613d54c5b673a58e48
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://druttle.ru/strik?utm_term=niv+study+bible+zondervan+large+print PDF link annotation
    • https://bigififipajug.weebly.com/uploads/1/3/4/7/134709095/wovalubo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473035/normal_606c67a91a611.pdfIn PDF document text
    • https://livaganomin.weebly.com/uploads/1/3/4/3/134399079/wodezavaka_kitunuvud.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427104/normal_60537b1a20ba9.pdfIn PDF document text
    • https://bawokuxuduxiv.weebly.com/uploads/1/3/1/8/131856062/bivojoripe-fazovuwanoludo-nafojaves.pdfIn PDF document text
    • https://vofitikasu.weebly.com/uploads/1/3/1/8/131871658/kizetu.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/bubodeliza/gawerurigelaritatamofarew.pdfIn PDF document text
    • https://s3.amazonaws.com/remavuj/gipotatesatimiwudemok.pdfIn PDF document text
    • https://s3.amazonaws.com/wazotojemov/wordpress_json_api_user_registration.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/911c2de2-633c-4818-bf0f-2735ad04f4c3/dimupakeleji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a458aea-7808-4342-9299-43aaa6d00c4a/honeywell_wifi_focuspro_6000_user_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/jajuzasalikirut/88994816896.pdfIn PDF document text
    • https://s3.amazonaws.com/latufenaw/vojimorujoso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7aeabe03-0bfb-4c83-89ab-b74f1fe8e010/31774297462.pdfIn PDF document text
    • https://s3.amazonaws.com/pesetufavo/zifukuvuzazi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30da0e7e-ee3b-4d77-b1f9-f1b314e81a83/was_the_phantom_of_the_opera_born_disfigured.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/034f729d-ee7e-4536-8d7f-a8ba2f031a5f/diwenibixopazati.pdfIn PDF document text
    • https://s3.amazonaws.com/punurum/biochemistry_books_u_satyanarayana_free.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_off0000ed98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED98 5448 bytes
SHA-256: 2307e7bc0d087098bcca48cd55d9ed112793310260c0113738363b3487bc36bb
font_01_sfnt_off00010042.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10042 12360 bytes
SHA-256: f15280dfe8c3016f6816c314107afe56450931bc8a62828fd9c80c579d7c6c04

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