Malicious PDF — malware analysis report

Static analysis result for SHA-256 530fbf65fc317ece…

MALICIOUS

PDF

91.9 KB Created: 2021-02-27 20:01:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: d9a5cfc1ffc1b1520d48bb565bb58bdc SHA-1: 4c91c4cba5536706cde324929d772106e829b88a SHA-256: 530fbf65fc317ecef9d2bece847607902089a1fb6a3028bf528486895d130b8e
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains numerous embedded URLs, with several pointing to disposable hosting and identified as part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were extracted, the presence of multiple suspicious URLs and the 'link farm' heuristic suggest the document's primary purpose is to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://dafemum.ru/award?keyword=storm+of+swords+hardcover+edition PDF link annotation
    • http://nogurufegu.mygamesonline.org/essential_clinical_anatomy_5th_edition_test_bank.pdfIn PDF document text
    • https://cdn.sqhk.co/jafakitiw/XPgguid/subway_customer_service_line.pdfIn PDF document text
    • http://cyberghost.store/business_analyst_course_syllabusrvmnq.pdfIn PDF document text
    • http://sowopezamiw.medianewsonline.com/words_that_start_with_eu.pdfIn PDF document text
    • https://cdn.sqhk.co/pasededi/halthiS/siweduvit.pdfIn PDF document text
    • https://cdn.sqhk.co/duzoxibuf/6bOmH81/70691275828.pdfIn PDF document text
    • https://cdn.sqhk.co/kafekogi/gygfiiK/phage_display_antibody_library_protocol.pdfIn PDF document text
    • http://gemotebefid.22web.org/blog_template_html_css.pdfIn PDF document text
    • https://cdn.sqhk.co/ketusugedi/bkhi6IN/best_song_ringtone_free_download_zedge.pdfIn PDF document text
    • https://cdn.sqhk.co/narulaloro/igibig8/2481659360.pdfIn PDF document text
    • http://slampochka.ru/lg_mini_split_problemse9lvm.pdfIn PDF document text
    • https://cdn.sqhk.co/navimoxa/jFHhfPe/91641491607.pdfIn PDF document text
    • https://cdn.sqhk.co/pozuwifofub/Mjfgggq/92541045446.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
    • http://bejopobu.epizy.com/59387716506.pdfIn PDF document text
    • http://lugopupi.rf.gd/3440882819.pdfIn PDF document text
    • http://kemivitakes.rf.gd/north_carolina_secretary_of_state_annual_report.pdfIn PDF document text
    • http://fivulesesixiji.epizy.com/civ_6_strategy_guide_book.pdfIn PDF document text
    • http://dipimov.epizy.com/ampicilina_sulbactam_dosis_renal.pdfIn PDF document text
    • http://xeziribosivamis.epizy.com/solved_aptitude_questions_and_answers_for_accenture.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011e98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E98 5272 bytes
SHA-256: 62318916a640d482bd3549f77a53a6e3d69c780df27fb3096cb3414fb76dac55
font_01_sfnt_off0001306c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1306C 10460 bytes
SHA-256: d5935d96ec11feefb91c8071f7b75be239dbb690b2f6e5153aa721135dd9e438
font_02_sfnt_off00015406.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15406 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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