Malicious PDF — malware analysis report

Static analysis result for SHA-256 f80a2c891ff15abc…

MALICIOUS

PDF

75.1 KB Created: 2021-03-20 18:37:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 698a715e0e927b78fd019fcb11590024 SHA-1: c5cbbb8f450a70dc3d65bb5e8ccea6c3e261cbb8 SHA-256: f80a2c891ff15abc2379f8e292c81b52e9a1dec5b1091add50ac2b5e8a072080
156 Risk Score

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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://resalured.ru/award?keyword=baby+names+in+tamil+boy+list+pdf PDF link annotation
    • https://cdn.sqhk.co/xubuzivo/1iaiaXy/armageddon_gear_single_point_sling.pdfIn PDF document text
    • https://cdn.sqhk.co/fuludasowipu/ghExiFL/5382798889.pdfIn PDF document text
    • http://japijemerojin.22web.org/boris_cyrulnik_mourir_de_dire_la_honte.pdfIn PDF document text
    • https://cdn.sqhk.co/futevanu/jchgigN/xatozoxotabebisewo.pdfIn PDF document text
    • http://lavorunolutoga.22web.org/kosawog.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/sosupejuxofedo/bomberman_tournament_gba_portugues.pdfIn PDF document text
    • https://734e8db3-b9db-457c-abaa-08c06218e7ae.filesusr.com/ugd/f6bb82_b22b486df9a54e6ea1b52bc52f5d2a90.pdf?index=trueIn PDF document text
    • http://tewufadab.epizy.com/74468032553.pdfIn PDF document text
    • http://xesunuz.epizy.com/unitedhealthcare_dental_insurance_phone_number.pdfIn PDF document text
    • http://ziwezamo.epizy.com/wugozeg.pdfIn PDF document text
    • https://f2f8a3c9-3ea7-4a25-b7e2-3e2749f32899.filesusr.com/ugd/f0e51d_b26a112a231a46c499d1e94546dd778b.pdf?index=trueIn PDF document text
    • https://234a0c07-d908-4261-bb83-16b3c96a9b04.filesusr.com/ugd/73e0e6_e3dcbb4d05364d07b84caf52489f346f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vinejivunitego/descriptive_and_inferential_statistics_worksheet_with_answers.pdfIn PDF document text
    • https://a62e46b8-d933-4087-892c-e5439cec6991.filesusr.com/ugd/e9cba9_b23d8cdfbc654f3d89823538bc64ff4b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jazuravazaguz/73885064523.pdfIn PDF document text
    • https://s3.amazonaws.com/remavuj/5185976398.pdfIn PDF document text
    • https://s3.amazonaws.com/mujevubutukoxu/college_board_practice_test_11_answers.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e861.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE861 5380 bytes
SHA-256: eda11ef350cd2a34c5fe30ca1c155aecf174c234d3c90ef82092e55ed06935dc
font_01_sfnt_off0000faa2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAA2 10664 bytes
SHA-256: 176cac087e28fe6080008d98dd5c8b1972aed326c4042b514f766555541e802e

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