Malicious PDF — malware analysis report

Static analysis result for SHA-256 0048b29016a2746e…

MALICIOUS

PDF

78.6 KB Created: 2021-05-25 06:44:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 2ea3fe395e0b8eb17370fcce28239b43 SHA-1: 51dcd1f6328fb82bf8f8099f7ee35b47910598aa SHA-256: 0048b29016a2746e6a680ce7c662ec2e2d7edbc2ed7141c54fde98e1464716ca
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 0.9997

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 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://zajinet.ru/strik?utm_term=mikrotik+command+line+reference+pdf PDF link annotation
    • https://zematewisa.weebly.com/uploads/1/3/4/8/134897668/3cedb11ab.pdfIn PDF document text
    • https://tipuzivi.weebly.com/uploads/1/3/0/9/130969377/bcbab4a0e451.pdfIn PDF document text
    • https://mijekonepe.weebly.com/uploads/1/3/2/8/132815105/6068441.pdfIn PDF document text
    • https://tifedagarowab.weebly.com/uploads/1/3/4/6/134641562/xaxafedapaxegejewozu.pdfIn PDF document text
    • https://baxemajoxololur.weebly.com/uploads/1/3/1/0/131070692/9824240.pdfIn PDF document text
    • https://sewokowoxukipa.weebly.com/uploads/1/3/4/8/134846336/e9bd180b7cc6b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lorerexeg/financial_accounting_questions_and_answers_multiple_choice.pdfIn PDF document text
    • https://s3.amazonaws.com/takateg/house_rules_template_for_tenants.pdfIn PDF document text
    • https://s3.amazonaws.com/wuwabobujasivor/organel_sel_hewan_dan_fungsinya.pdfIn PDF document text
    • https://s3.amazonaws.com/baxegezivumi/69142582870.pdfIn PDF document text
    • https://s3.amazonaws.com/votubukaxogilix/adnan_sami_tera_chehra_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd0e9db5-48cf-4e86-a92d-40e6c571f383/smart_board_exchange_games.pdfIn PDF document text
    • https://s3.amazonaws.com/podawakumepewez/biochemical_test_for_fungi.pdfIn PDF document text
    • https://s3.amazonaws.com/zafaronivaj/fourth_grade_multiplication_practice_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/belopudevuzuza/what_does_hardware_skills_mean.pdfIn PDF document text
    • https://s3.amazonaws.com/kibavutibeved/11813796890.pdfIn PDF document text
    • https://s3.amazonaws.com/dowavelaxam/how_to_print_digital_art_from_etsy.pdfIn PDF document text
    • https://s3.amazonaws.com/dobesogum/gedopap.pdfIn PDF document text
    • https://s3.amazonaws.com/kabisebax/marlin_336_scope_rings.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6b4fb90-a7a5-4bdc-86b3-ef3fd4e57049/does_toshiba_smart_tv_have_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e1b93a8-727c-41de-9b00-2b233991ec67/kings_quest_4_walkthrough.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_off0000f5be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5BE 5192 bytes
SHA-256: cd83eb590b9d1e78a2d440f2398870345c07b1a7f36d0277375c5a97a8bd0897
font_01_sfnt_off00010762.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10762 11128 bytes
SHA-256: 52cd47336ebfdcd0c04e9f7ec224b25f968663b389285de80720fe6139136d87

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