Malicious PDF — malware analysis report

Static analysis result for SHA-256 30320a604fa80d78…

MALICIOUS

PDF

73.0 KB Created: 2021-03-24 19:16:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e6ba69073e155ea321901114605aba79 SHA-1: 86bf88645a52dd46e1662d79f53c2033185080aa SHA-256: 30320a604fa80d7825883ea8b574cf7dd9486dac19321680a87b1232f621d80b
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 0.9993

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://midufefew.ru/wix?keyword=i+dare+you+book+frazer+brookes+pdf+download PDF link annotation
    • http://farvestnn.ru/86181544227914ju.pdfIn PDF document text
    • http://mini-cam2.club/outlines_of_chemical_technology_by_dryden5gzjv.pdfIn PDF document text
    • https://wetogukonitama.weebly.com/uploads/1/3/3/9/133997956/44de89835.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416918/normal_5fdf0e908ba3f.pdfIn PDF document text
    • https://xapenivivafozeb.weebly.com/uploads/1/3/1/3/131379266/b246a5eec.pdfIn PDF document text
    • http://creditpm.com/ancient_magus_bride_episode_7bguw3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456999/normal_605518f79242f.pdfIn PDF document text
    • http://uscreditscore.info/utorrent_web_for_windows_10nm9ht.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467287/normal_604a7bfd451c6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366369/normal_60468201499bc.pdfIn PDF document text
    • http://creamwalls.online/wutiwyh3t3.pdfIn PDF document text
    • https://menafemudiwifog.weebly.com/uploads/1/3/0/8/130813668/d6bb438bb.pdfIn PDF document text
    • http://haifaiv.ru/blaupunkt_frankfurt_stereo_installation_manualj9ijw.pdfIn PDF document text
    • http://idealslimitalia-ufficiale.site/930048915092bmb6.pdfIn PDF document text
    • http://abreudesigns.com/ladiwo2uuc6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449789/normal_6020688b87df7.pdfIn PDF document text
    • http://zodezabazigojab.iblogger.org/causas_de_anemia_normocitica_hipocromica.pdfIn PDF document text
    • http://starconflict-game.ru/36068529233v8hkm.pdfIn PDF document text
    • http://passive-income.ru/38663922484cjg8x.pdfIn PDF document text
    • http://domavera.ru/introduction_to_criminal_law_syllabus53cvy.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dojareloz.epizy.com/xebepazexebabine.pdfIn PDF document text
    • http://xugadizedema.rf.gd/achieve_ielts_listening_test_1.pdfIn PDF document text
    • http://zexenodu.rf.gd/16380186009.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_off0000e05f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE05F 5420 bytes
SHA-256: a0de252fc0bea7995c50e73128abf55cca2bd6bbc011ec56e0dd0aa47605c1fa
font_01_sfnt_off0000f300.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF300 10360 bytes
SHA-256: fa6485e2b077463c0feec8523c3a84b362abf8f0bcbc370fa56e029222a0d88d