Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fd33a70121bfdc5…

MALICIOUS

PDF

79.2 KB Created: 2021-04-18 22:55:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: b00e68fe0b1814a495b77500c30f9b14 SHA-1: 9ae7b6335727a0a5ae3bdf8ba7e6a0c2dd5bc390 SHA-256: 6fd33a70121bfdc5a17300df6abdbb8d4bdba9c31f9a79e521cd946d8bae18cb
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 0.9998

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://jottigo.ru/strik?utm_term=why+is+it+called+gilead+in+the+handmaid%2527s+tale PDF link annotation
    • http://gadatoreneperil.mygamesonline.org/aptitude_test_for_entrance_exam.pdfIn PDF document text
    • https://mapadubedebo.weebly.com/uploads/1/3/6/0/136095435/susilitazizo_gatix_mobekiruxi_xajukotanukoli.pdfIn PDF document text
    • http://vawadofofasip.getenjoyment.net/obama_speech_2020.pdfIn PDF document text
    • https://ruxikikigiligex.weebly.com/uploads/1/3/4/3/134347308/gesigiluko_libavef.pdfIn PDF document text
    • http://fasekafalig.scienceontheweb.net/5425854931.pdfIn PDF document text
    • http://koponegigat.medianewsonline.com/temple_of_sethraliss_orb_disappeared.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/xesigeze/http_uppbpb._gov._in_answer_key_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/padosumifubobo/87695287880.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1fe20cf1-6dc2-4b8b-bcdf-5599c952e025/how_to_do_tapping_to_lose_weight_in_a_month.pdfIn PDF document text
    • https://s3.amazonaws.com/mozedijiz/kevawifasikir.pdfIn PDF document text
    • https://s3.amazonaws.com/neporezofov/4782512824.pdfIn PDF document text
    • http://tiwatimab.atwebpages.com/27467692239.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/404841a2-af86-4426-86c6-b869edf79ae2/what_was_the_effect_of_the_amnesty_act_of_1872.pdfIn PDF document text
    • http://jelunegizubu.atwebpages.com/tintura_de_canela_de_velho.pdfIn PDF document text
    • https://s3.amazonaws.com/pibajuwi/how_to_eat_move_and_be_healthy_2nd_edition.pdfIn PDF document text
    • http://zepizevut.atwebpages.com/multiplication_and_division_of_algebraic_expressions_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/jukoxisojow/39958731708.pdfIn PDF document text
    • https://s3.amazonaws.com/fedufiporara/vujir.pdfIn PDF document text
    • https://s3.amazonaws.com/zafijukopa/15718293935.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0ec0387-2360-422e-a906-c45fe57ea6b8/lefubu.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_off0000f6a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6A2 5408 bytes
SHA-256: 08522c901d59907d154a34988b7559d2b89ad01bd3cf0419bb60a3ea6a619d6d
font_01_sfnt_off000108fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108FD 11488 bytes
SHA-256: f5a72a341dca51c90171845d23604ddba862cc407b4c3f7da14af6f7cf9c6902

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