Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7fa60f58ac550c2…

MALICIOUS

PDF

80.6 KB Created: 2021-03-14 13:34:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 83e1b8835855dece8906d19d12f17d40 SHA-1: f307ce0593f6de21928cda87c66544c1c954b3ca SHA-256: b7fa60f58ac550c22523c8e110dd92806301053731b59667d0b885c26ce07951
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm designed to direct users to potentially malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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=aplikasi+browser+pc+di+android PDF link annotation
    • https://givodevivunafa.weebly.com/uploads/1/3/1/8/131871579/b6dc406b1a7bc.pdfIn PDF document text
    • https://pasetesosetoje.weebly.com/uploads/1/3/0/7/130775590/e0d65b961b66646.pdfIn PDF document text
    • https://nepefiro.weebly.com/uploads/1/3/4/4/134494652/lororilodolo-zazatoja.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383444/normal_5ff3b50c92c33.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416131/normal_6019f88c64a9a.pdfIn PDF document text
    • https://sowimarigakuni.weebly.com/uploads/1/3/4/7/134705136/nopafi.pdfIn PDF document text
    • http://suluxigexu.22web.org/reazione_formazione_solfato_di_ammonio.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381098/normal_6031d4ef8a802.pdfIn PDF document text
    • http://pusaburuku.22web.org/negisuvogolemo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467306/normal_5fdf814aec85c.pdfIn PDF document text
    • https://woremudof.weebly.com/uploads/1/3/4/7/134701645/515124.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://8d6920c1-aef5-45ed-b1a0-e693d63948fb.filesusr.com/ugd/0a593f_8fda0f308b0d419f85ac9c13a970e268.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zexozavo/cid_moosa_songs.pdfIn PDF document text
    • http://medojowibapij.epizy.com/arabesque_sheet_music_piano.pdfIn PDF document text
    • https://f238abdf-92e3-4651-90df-65b6e8a648d9.filesusr.com/ugd/99965f_8e200110b8f346cca00a13f186510005.pdf?index=trueIn PDF document text
    • https://aa514bbb-a96e-4bc9-8ff3-0ca2edd1104f.filesusr.com/ugd/3fc21f_751b279eca8e4bb08656267619a68dd1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wegemebufojafak/chariots_of_fire_instrumental.pdfIn PDF document text
    • https://662517ce-f374-4037-aebd-99b1dbe00103.filesusr.com/ugd/0c4177_d93f36b063044f0ea4b94c2f99e4bdca.pdf?index=trueIn PDF document text
    • https://7fd92c66-d3af-485c-b7a9-31529ddfb1b5.filesusr.com/ugd/997d0f_44987159f45441a3a5f39f175300f79d.pdf?index=trueIn PDF document text
    • https://645c32c3-7e99-4959-b93b-7980205539d7.filesusr.com/ugd/30a31c_0b9c264267ef4d0d8282e6dc219e4bcb.pdf?index=trueIn PDF document text
    • https://b89c0965-50b5-483f-b67e-52f573158f4f.filesusr.com/ugd/1e222e_71ef5299932c4ee7a4acd0788bce1cd9.pdf?index=trueIn PDF document text
    • https://86f5e18a-8766-4ae7-b9bf-31430b627380.filesusr.com/ugd/911c12_df0e55bc22514973bfcfa5ed3766f55a.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_off0000f165.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF165 5060 bytes
SHA-256: be71fc43748aca31ebf25a789c1393f9b8f1ea1e9859ca8350cb616ab8c9278d
font_01_sfnt_off0001029b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1029B 10728 bytes
SHA-256: 5fda80307e5e29927f8b83eef8f9ba108b731d0ea2f6711342ed415de20449dc
font_02_sfnt_off0001270c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1270C 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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