Malicious PDF — malware analysis report

Static analysis result for SHA-256 db9384fea2c7134a…

MALICIOUS

PDF

75.4 KB Created: 2021-05-24 08:22:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 8a71827fdf24fd16b6f9034c92dfa9bc SHA-1: 552a9e076dee4874aac943ad2020202f4b2240c1 SHA-256: db9384fea2c7134ad4e17d0848b5a21b10c08948a5b3dfa80f51c9259b65d74c
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs, many of which point to disposable hosting and are likely part of a link farm designed to redirect users. The primary lure appears to be a search result for a specific query, aiming to trick users into clicking through to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://pelibifir.ru/strik?utm_term=how+to+find+a+group+with+no+owner+roblox+2020 PDF link annotation
    • https://tibiwoxot.weebly.com/uploads/1/3/4/8/134881218/91dc969641.pdfIn PDF document text
    • https://betewobinolatid.weebly.com/uploads/1/3/4/7/134756009/1868849.pdfIn PDF document text
    • https://kokesekodabese.weebly.com/uploads/1/3/4/0/134012443/todokosegipokel.pdfIn PDF document text
    • https://pujibotawajifuw.weebly.com/uploads/1/3/1/3/131379639/nirafagawoko-wefulewaf-ruwefobez.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381320/normal_601085e77b169.pdfIn PDF document text
    • https://pinejose.weebly.com/uploads/1/3/4/4/134467182/neligo.pdfIn PDF document text
    • https://xavedogaw.weebly.com/uploads/1/3/4/6/134659805/faverekigajar_senisutodet.pdfIn PDF document text
    • https://fababeporutow.weebly.com/uploads/1/3/1/3/131381804/4b0206a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426953/normal_6039bf21083d4.pdfIn PDF document text
    • https://tutamakut.weebly.com/uploads/1/3/0/7/130776204/4775320.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370284/normal_5fefa6e5e1fd1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386606/normal_601af54949b37.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502833/normal_5fe7980c126ae.pdfIn PDF document text
    • https://gokixojegesefa.weebly.com/uploads/1/3/4/8/134864476/benajad.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/fcc8e1c0-cb95-4fd5-8692-5766b667092a/lord_of_the_flies_book_review_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7718c3aa-a616-47f4-8f83-cb25e9258aeb/what_is_a_lean_business_canvas.pdfIn PDF document text
    • https://s3.amazonaws.com/welanisowari/gufebupogomaziw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4077c2a8-77c7-49a3-a96a-0a49b9fb5896/rabidawanabe.pdfIn PDF document text
    • https://s3.amazonaws.com/zalisujezajaje/tipos_de_sistemas_operativos_para_computadoras_y_celulares.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a48e1fa-09c5-4cd6-97c4-72d3c0df681b/a_series_of_unfortunate_events_personality_quizzes.pdfIn PDF document text
    • https://s3.amazonaws.com/nakevoja/does_purchase_score_transfer_mean_you_passed_naplex.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_off0000e714.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE714 5660 bytes
SHA-256: 87b94957254412838483acecdab2e283fa1a44ab0686ea9037666db083fb1426
font_01_sfnt_off0000fa66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA66 11120 bytes
SHA-256: d4770e9003be1a8e99123018f3a9322c0386772e55c9828b034b67205523f4cb

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