Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee9a83cc524469e8…

MALICIOUS

PDF

71.9 KB Created: 2021-04-04 19:37:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 6c275537e4948cfef2858e7ee8a35e64 SHA-1: b22a0a507101ca24686fac4caa8f1b4911010834 SHA-256: ee9a83cc524469e8c771abc226fb618deae04df3460886601905e732821140a2
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 0.9992

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://soxebez.ru/wix?keyword=defi+brilator+defi+nitive+anime+on+crack PDF link annotation
    • https://cdn.sqhk.co/tazakabebilo/icijfI1/60704799827.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421366/normal_602db0d4ea878.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387932/normal_6019381f12814.pdfIn PDF document text
    • http://gisoboxizaza.mygamesonline.org/51281807436.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469860/normal_5ffd30290fb92.pdfIn PDF document text
    • http://d2-club.ru/linear_and_nonlinear_function_tables_worksheet0wy16.pdfIn PDF document text
    • http://qupieasy.online/hinge_girl_answersynjpz.pdfIn PDF document text
    • http://dimopun.mywebcommunity.org/telekinesis_training_download.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/hbibhgc/87528995614.pdfIn PDF document text
    • http://lnstagram-blue-ticks.com/how_to_tell_between_viral_and_bacterial_sinus_infectionwgziw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474998/normal_5fe3d61ac755b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372354/normal_6059ac5f93fb1.pdfIn PDF document text
    • https://cdn.sqhk.co/tefaxobaf/eHKjhC4/arc_length_worksheet_geometry.pdfIn PDF document text
    • http://scotiaenlineape-personas.com/distributor_agreement_template_wordd2v4d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://98771922-91e4-4673-aa0d-7794f4435593.filesusr.com/ugd/b6aaa0_1970c2eee20041d1b18bdc5ce3509c9e.pdf?index=trueIn PDF document text
    • https://2a1457bb-a4d2-449b-8914-d784a503a6da.filesusr.com/ugd/c0fca2_2e276a64321c43c59e4f9cf6cde1d297.pdf?index=trueIn PDF document text
    • http://felugibesixe.onlinewebshop.net/homelite_xl12_parts_list.pdfIn PDF document text
    • https://s3.amazonaws.com/voxazedisula/college_panda_sat_math_practice_test.pdfIn PDF document text
    • http://lapetagalelan.myartsonline.com/28470822196.pdfIn PDF document text
    • http://buzumigasox.myartsonline.com/ludune.pdfIn PDF document text
    • https://a22c3535-4c29-4f26-bf6b-1e631d3648e5.filesusr.com/ugd/28986c_27e58386324a462fb3ba3e227bddbabf.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/ladojenefe/netacad_chapter_1_exam_answers_it_essentials.pdfIn PDF document text
    • https://s3.amazonaws.com/lodazojamuva/ryan_steck_the_real_book_spy.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_off0000da39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA39 5252 bytes
SHA-256: ed04f582b8d389a8007a8920e10d5558538d24314cd57685d9ff42df86196587
font_01_sfnt_off0000ec0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC0E 10620 bytes
SHA-256: 618dac2bd2e2c7fe9f574899078d5103a9cd1ac1976ec9d7cbe03be82ef116ca