Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d87741b3e1c6a5c…

MALICIOUS

PDF

78.1 KB Created: 2021-03-13 23:25:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: a1d3021f54ec0388a17b9d81baf2b969 SHA-1: e087fd5e36855547c4e2a076fa4f01b997b15a6f SHA-256: 4d87741b3e1c6a5cab268f05f6d6da0eb64627a95d9f4d65016cf8c2af56e1fa
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 0.9998

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://baarspo.ru/award?keyword=cadera+en+resorte+pdf PDF link annotation
    • https://cdn.sqhk.co/xizaxulubezu/UMhChjA/cartoon_video_app_store_download.pdfIn PDF document text
    • https://loseseseveru.weebly.com/uploads/1/3/0/8/130813975/197b6.pdfIn PDF document text
    • https://zuforupixonop.weebly.com/uploads/1/3/4/3/134394080/bea35d6336.pdfIn PDF document text
    • https://cdn.sqhk.co/kuruwoke/gjiipjg/vogejususozorar.pdfIn PDF document text
    • https://dozunetad.weebly.com/uploads/1/3/4/4/134472758/forefepobix.pdfIn PDF document text
    • https://retevewaluwur.weebly.com/uploads/1/3/4/6/134600892/1963760.pdfIn PDF document text
    • http://xejepurefe.scienceontheweb.net/excel_2020_charts_tutorial.pdfIn PDF document text
    • http://fosonelotila.medianewsonline.com/best_love_quotes_for_her.pdfIn PDF document text
    • https://cdn.sqhk.co/buvovemif/Eaighb8/khatrimaza_bollywood_movies_2020_download_free.pdfIn PDF document text
    • https://cdn.sqhk.co/xovikojux/gcgejin/rolling_ball_wall_sculpture_for_sale.pdfIn PDF document text
    • https://ronurakegilapoz.weebly.com/uploads/1/3/4/8/134852428/9349108.pdfIn PDF document text
    • http://woxuruko.medianewsonline.com/mazepuvopidutulagowod.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/a222bf59-3672-4177-9cda-4519315a68dd/fazapusalipevowipaxepasi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9215efb-af89-4c6b-a626-0316e0c91724/overeaters_anonymous_vegan_food_plan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d9e9e64-b792-488e-8242-5951eeda3c57/janupujabosurafi.pdfIn PDF document text
    • https://95c758d6-fd33-43c6-b5d0-f1f55e07e946.filesusr.com/ugd/cb0188_6bd2c7d06f08403ba6f6f979a9b08b01.pdf?index=trueIn PDF document text
    • https://d5fb4b5d-766d-4e54-ab1c-ecc61d2b7d82.filesusr.com/ugd/b0c8dc_72b72f48c72244fb8e476bc70b5be063.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5CA 4764 bytes
SHA-256: a4bec03116ee134e4fa7c29c614e036e88279526deb6fa3f4b6917d74e69ab5b
font_01_sfnt_off0000f604.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF604 11648 bytes
SHA-256: 23e07c21eff07130d7eda15c062458526e680107e20bc104fbcd6a0727cdf127
font_02_sfnt_off00011c13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C13 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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