Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0623097b6efadb9…

MALICIOUS

PDF

85.0 KB Created: 2021-04-03 12:10:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 76fe1c85c6f60fc44526059e8261b7c6 SHA-1: 9bd4c069fd308fd63902d9f17a12f24d998fc094 SHA-256: b0623097b6efadb9745eb51b26331082011f05c24f7e86d599f4b3d855b73529
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, specifically as a phishing or trojan delivery mechanism. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially malicious content. The presence of embedded URLs and the overall structure strongly indicate an attempt to lure users to external sites for further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://baarspo.ru/strik?utm_term=how+to+clear+bluetooth+memory+on+pioneer+avh-p3400bh PDF link annotation
    • http://fresh-ita.fun/bayesian_data_analysis_redditnsl7z.pdfIn PDF document text
    • https://cdn.sqhk.co/jesovolavig/ghgcha7/is_vooks_free_for_parents_right_now.pdfIn PDF document text
    • https://cdn.sqhk.co/bujasugawo/jbjd4Fp/dosipofavasitaj.pdfIn PDF document text
    • http://tryici.xyz/chiang_rai_tourist_map3bdif.pdfIn PDF document text
    • https://gogesatita.weebly.com/uploads/1/3/4/3/134321397/295fa49c94be58.pdfIn PDF document text
    • https://cdn.sqhk.co/kukisigafumi/TboTjaf/ludo_star_new_2017_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/mugapowejog/idPiahe/ring_a_bell_idiomatic_meaning.pdfIn PDF document text
    • https://mudatikijamowa.weebly.com/uploads/1/3/1/4/131408537/4548266.pdfIn PDF document text
    • https://cdn.sqhk.co/falunibesedo/arhaIha/ringtone_2020_love.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462037/normal_5ffe1701f13dc.pdfIn PDF document text
    • http://new-leggins.site/minazoturupevasux3ctpo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472763/normal_600e8847194c9.pdfIn PDF document text
    • https://cdn.sqhk.co/lemusezilaz/hby8gCZ/batenaxama.pdfIn PDF document text
    • https://lepimezuraz.weebly.com/uploads/1/3/4/5/134599896/9360692.pdfIn PDF document text
    • https://cdn.sqhk.co/bonosexov/i6jigfA/burger_king_menu_2_burgers_for_50.pdfIn PDF document text
    • http://raisinsapp.club/8113659222068ues.pdfIn PDF document text
    • http://huaweistoreukr.xyz/ckz_origins_hacked_apk_downloadociye.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493876/normal_606100a687fdb.pdfIn PDF document text
    • https://pobunusegem.weebly.com/uploads/1/3/4/4/134460984/7441113.pdfIn PDF document text
    • https://cdn.sqhk.co/tosuwukiwate/cVhdgiQ/44109490330.pdfIn PDF document text
    • https://cdn.sqhk.co/nuditufu/ohdcigS/free_funny_ringtones_for_android_samsung.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479933/normal_6013c4d4d9697.pdfIn PDF document text
    • http://reduslim-ufficiale.website/51643213993sdseq.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7A2 5776 bytes
SHA-256: 5921d80cf8c08f3a4c84beca23be9ec20a7cc456baee37df57e08f168994041d
font_01_sfnt_off0000fb48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB48 4284 bytes
SHA-256: 13a4c3882f05e816c4fa58a288011a5a22b8954dc926510551c739476dcf863e
font_02_sfnt_off000106cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106CD 11344 bytes
SHA-256: 8f436fdb3a1a69a9ed66c4b16f3df5cf2318372daad4ef51960abcbcb0185a97
font_03_sfnt_off00012db8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DB8 16304 bytes
SHA-256: 36298d9b42482ef505b651e9545134b76438dad7e59d1f17d96a2cc3761d4b83

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