Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ab2bce1a88a2b8b…

MALICIOUS

PDF

95.4 KB Created: 2021-04-13 09:25:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: f68422d281abdce888b1f2a71c379b63 SHA-1: 50f44472cbf0c158acc3f6544f4a96a24c65e898 SHA-256: 5ab2bce1a88a2b8b4c37fcfb7b6769975048f67821d9bbdbd152a1637e4acad4
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9950

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 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://fokemale.ru/strik?utm_term=what+is+the+quietest+2000+watt+generator PDF link annotation
    • https://fozikubovofow.weebly.com/uploads/1/3/4/8/134897471/5781228.pdfIn PDF document text
    • https://jafoxoxuxovawe.weebly.com/uploads/1/3/0/8/130813536/573577b61.pdfIn PDF document text
    • http://filuxunokenobud.mygamesonline.org/68276527111.pdfIn PDF document text
    • http://xedeporib.medianewsonline.com/dawalabevalituxenurizaves.pdfIn PDF document text
    • http://tomolijoponix.mypressonline.com/what_are_the_principles_of_design_and_their_meaning.pdfIn PDF document text
    • http://tatuxuvoziparu.mywebcommunity.org/how_to_bypass_a_zone_on_dsc_alarm_panel.pdfIn PDF document text
    • http://rutinesuzufogat.mypressonline.com/monoculture_fish_farming.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/d3f21d81-4e95-4fa6-b9ba-a490f4f80f7c/bluetooth_software_for_windows_10_free_download_64_bit.pdfIn PDF document text
    • https://s3.amazonaws.com/kiwopusafize/kaun_banega_crorepati_quiz_questions_with_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec03cf12-e1e8-4ab7-b99c-06b76057dbda/60989484046.pdfIn PDF document text
    • https://cf587a47-7c2f-4f55-8bbb-21a4c73503f7.filesusr.com/ugd/8ea597_ddcc7365aa1d4ad2b1a5149c64ef841c.pdf?index=trueIn PDF document text
    • https://52ed6390-a5c1-4502-9f93-599cf6d98ad1.filesusr.com/ugd/f7fbc8_47fb228a4b764ac0864239de55dad981.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sizadagazagaj/julosigiwa.pdfIn PDF document text
    • http://pudosuvosav.atwebpages.com/alexander_fleming_biografia.pdfIn PDF document text
    • https://s3.amazonaws.com/rujabepifar/nitibizu.pdfIn PDF document text
    • https://3485775d-af35-4505-8fb4-f6750f575e04.filesusr.com/ugd/42f18e_9d389f710b85409588b6e08d5e607a19.pdf?index=trueIn PDF document text
    • http://pofijiserige.onlinewebshop.net/17913007996.pdfIn PDF document text
    • http://tonavisuma.onlinewebshop.net/79159228064.pdfIn PDF document text
    • https://1c54689f-8f60-44d8-8d81-b144d6ea8ada.filesusr.com/ugd/787b0a_a4ff0ffa4f4a4ba29b32a8fa488abeac.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fekaduvopigab/empires_and_puzzles_guide_7dd.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab443234-cc3a-4805-86b3-394115a63306/how_to_open_lint_filter_in_lg_washing_machine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c022f941-7a48-46d5-ad41-19f5d74ec8b0/27208349725.pdfIn PDF document text
    • https://041bbef9-4dd1-43b9-9ec7-2672afc16ec1.filesusr.com/ugd/686814_a5fed78380eb43cd8b509bcdf1278736.pdf?index=trueIn PDF document text
    • http://furipurisebete.onlinewebshop.net/kabogupibexigaziferaror.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34dee5ed-20e8-4cad-921a-1d62224c5100/44861639132.pdfIn PDF document text
    • https://s3.amazonaws.com/wikurixobelu/kigipegezawozidufigonet.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_off00012b25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B25 2952 bytes
SHA-256: cb9072f881c1fe0ad8900bbcc5a20a23fabb306412f64e001cac76c2a9509f2c
font_01_sfnt_off000135b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135B4 5420 bytes
SHA-256: 86ef55589fa1026ed6a54ee6fac7bdd96999becab7554392bd3ef78d7a6721ee
font_02_sfnt_off00014837.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14837 11512 bytes
SHA-256: fefff42d11fb4a21760ea9ee91af1d95610dba826bed073b6b205d8ea5c4e208