Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc6fb58c0f2d2a8b…

MALICIOUS

PDF

76.1 KB Created: 2021-03-05 05:25:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 09ad80b9c8c8bb18f6e056a339b386ba SHA-1: c5a00d627b50da8f7a4c2392af0c0a752349e348 SHA-256: dc6fb58c0f2d2a8be7090b8a09bcda263480d119f18965f6f653f96bee52bafe
186 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 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://maypoin.ru/123?utm_term=watch+pride+and+prejudice+online+with+english+subtitles PDF link annotation
    • http://xogovegakim.22web.org/gelezigox.pdfIn PDF document text
    • https://jinoranimewaxop.weebly.com/uploads/1/3/4/5/134528513/1424898.pdfIn PDF document text
    • https://fapopadiwa.weebly.com/uploads/1/3/1/4/131438416/likugita.pdfIn PDF document text
    • https://tamoniwezetiro.weebly.com/uploads/1/3/5/9/135961995/timegomuxejezo_podawabamodex.pdfIn PDF document text
    • https://xofebigile.weebly.com/uploads/1/3/0/7/130739964/dabiwumifuvonozuf.pdfIn PDF document text
    • https://nekemobo.weebly.com/uploads/1/3/5/3/135323096/2611814.pdfIn PDF document text
    • https://fakadaro.weebly.com/uploads/1/3/5/9/135961508/ca535e1178b5cff.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490539/normal_5ff3f171ca085.pdfIn PDF document text
    • https://rokosogamutoluf.weebly.com/uploads/1/3/0/8/130873735/6d0065.pdfIn PDF document text
    • http://rajedat.iblogger.org/ctet_question_paper_2019_with_answers.pdfIn PDF document text
    • http://pawaridifos.iblogger.org/kathi_tamil_movie_1080p.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370791/normal_5fdaa962d8e82.pdfIn PDF document text
    • https://zewurutivuzaned.weebly.com/uploads/1/3/4/8/134888434/b75ea2ac23b2.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/8a96d85b-f7d8-4650-a1a6-1f2c8cb9b682/burezijopajodutiduvejogi.pdfIn PDF document text
    • http://rukusogizowo.epizy.com/verbs_worksheets_grade_5.pdfIn PDF document text
    • http://sekevidijonuji.rf.gd/44972190551.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66a5e025-0c6c-49c5-9e09-1d8058dc8597/can_i_get_a_new_remote_for_my_lg_tv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b067e1fc-871d-45ca-ae2f-59cc0bce7314/70138959904.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_off0000eb9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB9C 5656 bytes
SHA-256: 8d4fa6d73992741912b269dab81e782c6c5fc454f9cda0c2ca3312c172f67ac1
font_01_sfnt_off0000feef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEEF 10388 bytes
SHA-256: bcac4ddbdd120bb5512578f783467f2018aa42cc672a25c92a7303d6795cfb16

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