Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c9ab2ef1ce906e2…

MALICIOUS

PDF

79.1 KB Created: 2021-06-09 05:58:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: dc6a8676c241cbb8455c445007533b3e SHA-1: 0607f700fe68d941fa00912ec7491c6a2a0ba713 SHA-256: 9c9ab2ef1ce906e27fec6c8090a4a4a84d25b1ae2dbc18ba973682b5e8993660
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://irlanc.ru/pbw?utm_term=download+hack+app+data+no+root+apk PDF link annotation
    • https://pemovoxi.weebly.com/uploads/1/3/4/6/134680353/maluw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487206/normal_5ffc31aac75ba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421050/normal_6016d0ee175b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418199/normal_60bfad3a9316a.pdfIn PDF document text
    • https://dikodaselafilug.weebly.com/uploads/1/3/4/1/134108642/88b155cddd6b.pdfIn PDF document text
    • https://kakizizutubune.weebly.com/uploads/1/3/4/3/134351089/nobuzamepejew.pdfIn PDF document text
    • https://bidumijedurazi.weebly.com/uploads/1/3/1/4/131437194/kavakelarur-futigejebatob-zomusuretefiti.pdfIn PDF document text
    • https://domuvajedoxu.weebly.com/uploads/1/3/4/8/134847007/pifidilug.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487902/normal_6046004323aec.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388613/normal_6005a4ee4dcde.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449788/normal_604c98bb51c86.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386076/normal_6028876251ae7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pakesobiroge.pbworks.com/f/ms_office_2007_tutorial_in_hindi.pdfIn PDF document text
    • http://pojaweku.pbworks.com/w/file/fetch/144595731/panawoloduw.pdfIn PDF document text
    • http://jebusolole.pbworks.com/w/file/fetch/144491931/53648852218.pdfIn PDF document text
    • http://negaboxa.pbworks.com/w/file/fetch/144476166/rafael_orozco_novela_capitulo_43_completo.pdfIn PDF document text
    • http://doxawadar.pbworks.com/w/file/fetch/144495606/rogirefesegegezuze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3da74ed-7ce5-4e70-a024-cd674a23565b/vodokegi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db5bea6a-22fd-4241-945b-0dbc0f650703/chemistry_data_booklet_higher.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80fb79e9-d826-4a8c-81e7-508b5df29c4b/suvaguzozuwituponaxure.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2202892-538e-4553-86ec-10d75c84f0c4/76394960072.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd990906-d6f8-429c-a9db-35fd62de0b29/dipaxejuba.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_off0000f98b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF98B 5136 bytes
SHA-256: d80ae4b394dadab79f2c56ad20e975bf93a76588117abb7867003287bf0fe061
font_01_sfnt_off00010b1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B1B 10488 bytes
SHA-256: 984fc6a8f70fd1d6d9458a69367dd77bf6b49c6459f8912b526b09491c91205a

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