Malicious PDF — malware analysis report

Static analysis result for SHA-256 15009550ce7b044e…

MALICIOUS

PDF

86.9 KB Created: 2021-04-06 00:36:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 83e60abcc3a59d476bb58a0abba4791c SHA-1: dc8fd01995756cf2636a355945678a058afefeef SHA-256: 15009550ce7b044efbe5d748b2189ab461ad52d75765c34b1df452fc48300a6d
156 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 0.9995

Heuristics 5

  • 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.
  • 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://xajibur.ru/123?utm_term=spread+spectrum+technology+pdf PDF link annotation
    • http://fevofawemuwa.medianewsonline.com/74199775817.pdfIn PDF document text
    • https://cdn.sqhk.co/loganidob/dfTrKDq/top_up_my_tesco_sim_card.pdfIn PDF document text
    • https://cdn.sqhk.co/zimalodepafo/gTuH9Rm/arteriovenous_malformation_ascending_colon.pdfIn PDF document text
    • http://wuxemit.iblogger.org/sql_timestamp_format_am_pm.pdfIn PDF document text
    • https://cdn.sqhk.co/xuxovunevo/CM2O8jj/dr_driving_2_mod_apk_download_rexdl.pdfIn PDF document text
    • http://zujewubowufonug.scienceontheweb.net/mitunetopisasesat.pdfIn PDF document text
    • https://cdn.sqhk.co/wuvidomanale/0libjic/zavaliputadipaxabopupe.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://a5f97fb6-6895-4a42-8c51-2de4018fe37d.filesusr.com/ugd/1eae48_512e18082ccd4e409c7bf1de308d7362.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dazifozixawus/87856758794.pdfIn PDF document text
    • https://5bf49506-6ef1-42f8-8f90-7e3689255fd3.filesusr.com/ugd/8fe1bf_cff096967f3c44418ab02ef581bacbc0.pdf?index=trueIn PDF document text
    • https://327bbe42-9aa5-4ca0-80e5-6c9857058a26.filesusr.com/ugd/2b870b_9437aa20a4194b8e99ae77ec67b4b079.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lodazojamuva/engineering_dynamics_corporation.pdfIn PDF document text
    • https://s3.amazonaws.com/sivanira/51496579061.pdfIn PDF document text
    • https://s3.amazonaws.com/jubiferekaka/48206155303.pdfIn PDF document text
    • https://56f9ebfc-1b58-4ccd-90b9-24793863e956.filesusr.com/ugd/0f3536_3df22d66ad794ec09a1bb845b3b3eff3.pdf?index=trueIn PDF document text
    • http://nisuzadusidu.epizy.com/s_letter_heart_pics.pdfIn PDF document text
    • http://misamoxatupepos.rf.gd/management_of_anaphylactic_shock.pdfIn PDF document text
    • https://s3.amazonaws.com/remuv/pizza_party_flyer_free_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6781f154-86cf-4d33-8d0f-4361f9fefdc6/where_can_i_buy_a_pizzazz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1622b51d-4d8c-4b71-96e5-ed3a782747ef/how_to_program_car_garage_opener_without_remote.pdfIn PDF document text
    • http://gevuraragide.rf.gd/zerudawiviwin.pdfIn PDF document text
    • http://getetir.epizy.com/6565111886.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000108e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108E9 5608 bytes
SHA-256: 86e909847973fc24ecd525819ae263f89e4a603fddaae8f0513e51545cf5ccc4
font_01_sfnt_off00011bd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BD8 10532 bytes
SHA-256: 4fa489899d1bac72ce34a35d3d48e2ca2a17129062f7af763d70fbb940167c4c
font_02_sfnt_off00013fc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FC9 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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