Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec81d3d6a2249eed…

MALICIOUS

PDF

68.8 KB Created: 2021-02-27 05:21:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 824835dc5b23c514383bcf5ce527c364 SHA-1: ea33e08b03d1bb6253b36fe00bc4828c0ce5cc23 SHA-256: ec81d3d6a2249eed87adc521bf2ae0fa42830f1cf92b91e33c002bbfc78cdd3c
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 0.9998

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 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=on+the+road+again+monte+meme PDF link annotation
    • http://natur-bio.space/standardized_test_practice_circuit_mixed_answer_keyn5vvi.pdfIn PDF document text
    • http://nutupiwerumad.66ghz.com/figures_of_speech_worksheet_for_grade_8.pdfIn PDF document text
    • http://lezeninimi.medianewsonline.com/good_classes_for_warforged.pdfIn PDF document text
    • http://milansit.space/kemuluwafosijinafep0aph.pdfIn PDF document text
    • http://lodomujimujug.mywebcommunity.org/the_love_dare_day_by_day_reviews.pdfIn PDF document text
    • http://ch-redirect.icu/repezutikikajunojusavororiosmf.pdfIn PDF document text
    • http://com-connexion.xyz/kawitwzr1l.pdfIn PDF document text
    • http://bamefidev.mygamesonline.org/free_online_digital_marketing_courses_with_certificates_by_microsoft.pdfIn PDF document text
    • http://kogutojoveso.mywebcommunity.org/how_to_make_your_own_lithium_ion_battery_pack.pdfIn PDF document text
    • https://votopugukoz.weebly.com/uploads/1/3/5/3/135315446/luliso.pdfIn PDF document text
    • http://zelopaqq.xyz/9072364513bugqf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ziboporo.epizy.com/nugoxagiz.pdfIn PDF document text
    • https://s3.amazonaws.com/xipavir/candy_crush_saga_hack_pc_free.pdfIn PDF document text
    • http://zapofekeba.rf.gd/24878136898.pdfIn PDF document text
    • http://jonapepubenej.epizy.com/xabipufapisagejaba.pdfIn PDF document text
    • https://s3.amazonaws.com/sinadi/facebook_apple_mac.pdfIn PDF document text
    • https://s3.amazonaws.com/sebunuzu/rizilizepuleduxasu.pdfIn PDF document text
    • http://xafexuw.epizy.com/53275354268.pdfIn PDF document text
    • https://s3.amazonaws.com/sugowubuf/vulaxowunomibagi.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_off0000d022.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD022 5056 bytes
SHA-256: 4b42befe6d0ced385002939c496560f7ffbad02c5ca5435d875a9948d5a9fa79
font_01_sfnt_off0000e127.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE127 10940 bytes
SHA-256: cb401895f8a05673e73adb6e5e0ac39bf140861b37f19a8edea86d749b148553