Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c8e55ee29c876fe…

MALICIOUS

PDF

73.5 KB Created: 2021-03-15 06:52:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: fee8a38165e43de3ef3a43f451074e7a SHA-1: 74ffe6090b84aec5f34caa9f85613b3a0ab58d93 SHA-256: 0c8e55ee29c876fe9f3e159e601b735a0dcc7a8d24f77693ba2e5d35079ad1b0
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://bologen.ru/123?utm_term=online+movies+hollywood++free PDF link annotation
    • https://cdn.sqhk.co/dosojegomugu/Vgcugf7/75676613254.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465277/normal_5fe4f9d2c6a1a.pdfIn PDF document text
    • http://lnstagram-blue-ticks.com/how_does_food_taste_badtvb3l.pdfIn PDF document text
    • https://mekegeno.weebly.com/uploads/1/3/1/8/131856852/7452195.pdfIn PDF document text
    • https://torevoxun.weebly.com/uploads/1/3/2/7/132712334/a355d.pdfIn PDF document text
    • https://cdn.sqhk.co/wevamerazo/hciijih/99762944142.pdfIn PDF document text
    • http://pelobana.66ghz.com/basel_1_2_3_explained.pdfIn PDF document text
    • https://xepezexitig.weebly.com/uploads/1/3/0/9/130969834/kibubiramura-panele-vufezunediponer-lupix.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481052/normal_6032a92413e73.pdfIn PDF document text
    • http://beststudent.fun/ammadi_ammadi_song_karaoke87sbc.pdfIn PDF document text
    • https://sisaweroz.weebly.com/uploads/1/3/4/5/134587393/5495945.pdfIn PDF document text
    • https://venevivoxeda.weebly.com/uploads/1/3/1/8/131857756/5826455.pdfIn PDF document text
    • http://bofinaposo.iblogger.org/chhichhore_movie_songs_zip.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://8e12fe21-47c1-448c-af9e-883e7c84523b.filesusr.com/ugd/52ac5e_8a6af0e4b28c4a4bbd42be02b9ab6fe3.pdf?index=trueIn PDF document text
    • https://5c71d6b4-13b5-43a2-97a4-9a0eba4d0f4d.filesusr.com/ugd/0f1814_09f4f351a44e465093f8d849b82163b1.pdf?index=trueIn PDF document text
    • https://6c473ef0-402e-45f0-9f95-6bc7e89a6a1a.filesusr.com/ugd/5518c3_6896bf1f937a414c8d274ce36cfd6dcd.pdf?index=trueIn PDF document text
    • https://f1ddcea9-c323-452c-a4d3-aaefec61e50a.filesusr.com/ugd/defd8a_3925a4a8522c41cea792fd6a0cc85808.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e1c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1C3 5220 bytes
SHA-256: 7eb85215a9f67289e50730d2edf9d4bf5b9743a07312a9e60be75a924c51c4b1
font_01_sfnt_off0000f376.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF376 10952 bytes
SHA-256: 605130f84968aed7080cece034a68189fa5acdabdca8da5306648582c0c34868

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