Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e19fc05a4f1d183…

MALICIOUS

PDF

69.9 KB Created: 2021-03-22 13:59:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: fc6319b17aceb9747aaa0fb5775c3452 SHA-1: 5b20a09ed8c8590b52ce46cd875141a268e9b851 SHA-256: 6e19fc05a4f1d183dc63dcfe9c5014e71b3541444b9b56362034f83ae3dcae70
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://jottigo.ru/123?utm_term=android+developer+bluetoothsocket PDF link annotation
    • https://pilewamef.weebly.com/uploads/1/3/4/8/134849526/ligoledepifuw.pdfIn PDF document text
    • https://vegipojefatelon.weebly.com/uploads/1/3/4/8/134876486/e4dc9faa73.pdfIn PDF document text
    • https://lotatodekimin.weebly.com/uploads/1/3/4/7/134705716/7176313.pdfIn PDF document text
    • http://rasezatoxefu.mygamesonline.org/what_is_the_traditional_music_of_singapore.pdfIn PDF document text
    • http://tufuwavaziga.mygamesonline.org/luxilakokafuj.pdfIn PDF document text
    • https://lugilalosu.weebly.com/uploads/1/3/4/3/134314137/2991028.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/2e6d5378-cb4a-4014-bc27-b30030ac473d/nordictrack_c2150_dimensions.pdfIn PDF document text
    • http://duwufinojitu.rf.gd/enlace_quimico_concepto.pdfIn PDF document text
    • https://s3.amazonaws.com/batiku/after_series_book_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8691ff06-7faf-4e2a-ab83-103ecaf04ba9/jawefefidukozit.pdfIn PDF document text
    • http://fuxopipojuwepi.epizy.com/nibizenozigowifagavanom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11222264-f69f-4888-bc71-1fc89a61583f/modelo_de_minuta_de_una_empresa_sac.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzaganog/93077882832.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4253351d-4ad6-49d9-bdb0-57789ade82dd/pilibedazewomaxa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/283b2061-3f51-4451-a058-878fd1fb58e6/delta_table_saw_fence_replacement_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50e51776-32b5-44e0-a6d0-f545fa5c9a7e/tenuxisobanone.pdfIn PDF document text
    • http://titugol.atwebpages.com/zifuwe.pdfIn PDF document text
    • https://s3.amazonaws.com/tizowodifi/17587512915.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ba4b51d-7fb7-4b92-af52-3919aa24bb50/drug_calculations_made_incredibly_easy.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_off0000d357.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD357 5204 bytes
SHA-256: 99139dfe22ead020d6c141cd0d0c3fb31ec16c6bd28dea270fd747aa85c0f574
font_01_sfnt_off0000e504.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE504 10972 bytes
SHA-256: 9b254e7a60125f8205efab3f6c34a23f397be293311bdac573c20b14a9be3698

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