Malicious PDF — malware analysis report

Static analysis result for SHA-256 4342911c8490a695…

MALICIOUS

PDF

68.1 KB Created: 2021-03-18 01:28:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 6e9d9fd7288588ca6faacd0a9e4db136 SHA-1: 61a448a19ef792e070fb95ab67fd862de50f3c9d SHA-256: 4342911c8490a6950eca00343130ef5bb9b6e6ff99c201be86ab235d8be6445a
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

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 0.9417

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 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
  • 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://pelibifir.ru/award?keyword=save+pdf+smaller+size+mac PDF link annotation
    • https://gupapuna.weebly.com/uploads/1/3/4/7/134726568/7833488.pdfIn PDF document text
    • https://fotelosalif.weebly.com/uploads/1/3/4/4/134463398/8738720.pdfIn PDF document text
    • https://cdn.sqhk.co/rapovixovuti/hvp10o9/fumifujamulovej.pdfIn PDF document text
    • https://jobifavizatop.weebly.com/uploads/1/3/4/1/134108852/mobuvawarim.pdfIn PDF document text
    • https://lowezikalazana.weebly.com/uploads/1/3/0/9/130969016/8797743.pdfIn PDF document text
    • https://cdn.sqhk.co/rumoligodo/jD4jgca/english_reading_comprehension_test_grade_9.pdfIn PDF document text
    • https://dufadijikog.weebly.com/uploads/1/3/5/3/135325035/7b5fd9b75f566.pdfIn PDF document text
    • https://wozukepob.weebly.com/uploads/1/3/4/0/134017809/mewuxototuxa.pdfIn PDF document text
    • https://cdn.sqhk.co/ziriziwebu/ahi5hCZ/29728975144.pdfIn PDF document text
    • https://cdn.sqhk.co/maxevurux/agiie8Q/dragon_village_oro_valley.pdfIn PDF document text
    • https://juwaxevepatasi.weebly.com/uploads/1/3/0/8/130874094/midusisiti.pdfIn PDF document text
    • https://jufukakoxojopop.weebly.com/uploads/1/3/4/3/134317893/1674876.pdfIn PDF document text
    • https://cdn.sqhk.co/woluzadeviv/iih0S6p/tenenuwiwel.pdfIn PDF document text
    • https://jomufoxubibad.weebly.com/uploads/1/3/1/1/131164047/4795bd6ee.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/neviwove/nordictrack_gx_4.7r_manual.pdfIn PDF document text
    • https://d23eb412-52e1-45ef-a32a-0c032022daee.filesusr.com/ugd/03485a_d729656047694380a775e74abbadf355.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9ddc84a-6526-4716-9acd-5ac6f41ed3fd/olentangy_bell_schedule_2020.pdfIn PDF document text
    • https://e082b6be-64c0-45f6-a8ff-82b9c6f476f0.filesusr.com/ugd/1479de_5c0cc756174f4b649f5dbaa8494ecc56.pdf?index=trueIn PDF document text
    • https://fdb0147f-387d-4908-9c93-1ccdb5bf775f.filesusr.com/ugd/aea2e0_c45afc3763cb4eb2b2367f86bc220368.pdf?index=trueIn PDF document text
    • https://95fbbc11-640f-4658-acdf-6e09da746871.filesusr.com/ugd/e42ee3_7d5e2c51e3074f31828354604abb0948.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab5377c5-1b59-4013-8bf2-173557714598/where_to_buy_samsung_washer_parts_near_me.pdfIn PDF document text
    • https://367e539a-c541-4439-991c-4bf2bef2aa7a.filesusr.com/ugd/77d535_725b1114cf60456d98ea156d17d9a1ce.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/midaguvimabof/73471522042.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f618.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF618 5008 bytes
SHA-256: 15319d6ccf2040b6bb8442a9f328f181514a9426ede349da696baecf36f48f7f

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