Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd2b36621c0a7827…

MALICIOUS

PDF

95.3 KB Created: 2021-02-17 16:30:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: d7414616c6fe574f8d904d4922b0e539 SHA-1: 28229b513725c7be10c6f9a10e95e1f1972e8277 SHA-256: cd2b36621c0a7827c3a49ec903ee45f2078be03b91465343e3491cfa73988f73
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO spam campaign. The document body, though heavily obfuscated, appears to contain keywords related to search terms, reinforcing the lure to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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://leonvi.ru/wix?keyword=paula+sheppard+movies PDF link annotation
    • https://cdn.sqhk.co/ranemagesoga/67ighj1/semog_buggy_racing_ireland.pdfIn PDF document text
    • https://sifejolo.weebly.com/uploads/1/3/1/4/131410009/mirarazakufedib-besafidugugo-nubegik-revuwefofal.pdfIn PDF document text
    • https://cdn.sqhk.co/datolabevev/figidaU/super_soccer_snes_nintendo_team.pdfIn PDF document text
    • https://papenuxid.weebly.com/uploads/1/3/0/8/130874395/jamawe.pdfIn PDF document text
    • https://xibemorebag.weebly.com/uploads/1/3/4/3/134355918/5bff464d938f.pdfIn PDF document text
    • https://zalivibutadugaf.weebly.com/uploads/1/3/5/3/135391941/nafagozujikazaz-loxukowatefub-malezo-gixokomum.pdfIn PDF document text
    • https://cdn.sqhk.co/mitugejaxel/iedxGV5/tejizuf.pdfIn PDF document text
    • https://cdn.sqhk.co/fatepotax/guriijj/beat_the_boss_3_best_money_maker.pdfIn PDF document text
    • https://rowegodidevonu.weebly.com/uploads/1/3/4/4/134468430/pusegawog.pdfIn PDF document text
    • https://cdn.sqhk.co/jaselavujuwi/ynhcghw/6354706329.pdfIn PDF document text
    • https://cdn.sqhk.co/ganidabizi/jhheNji/hive_with_ai_board_game.pdfIn PDF document text
    • https://vamemaxodoj.weebly.com/uploads/1/3/1/4/131437173/fc7ebf395.pdfIn PDF document text
    • https://cdn.sqhk.co/ligumorik/UqhahaT/gulezilesopomufigo.pdfIn PDF document text
    • https://cdn.sqhk.co/tefozakozup/xgcU59G/raid_shadow_legends_advertisement_meme.pdfIn PDF document text
    • https://fuwefepitebu.weebly.com/uploads/1/3/4/7/134709748/jabam-fisesominote-risobuz.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/dovulavavo/coldplay_paradise_lyrics.pdfIn PDF document text
    • https://s3.amazonaws.com/vobuturinivi/create_excel_spreadsheet_programmatically.pdfIn PDF document text
    • https://s3.amazonaws.com/likerajatob/shimano_alfine_8_maintenance_manual.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_off000137c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137C5 5260 bytes
SHA-256: 1504b64412096c503bd0e3c24719e009184bf5ceb0d010a0f32354e77e2f2adf
font_01_sfnt_off00014983.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14983 11212 bytes
SHA-256: d27219e429387ed230a00009db75e7fa4f75f592896d151ba6ad144618535dd1

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