Malicious PDF — malware analysis report

Static analysis result for SHA-256 54bf2ba8d04162b5…

MALICIOUS

PDF

80.0 KB Created: 2021-09-08 07:43:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: de991942a67177200315c2872bf4c578 SHA-1: 26edc8f1493e3e0b00f497a24c96948a9502666b SHA-256: 54bf2ba8d04162b57cbf5dec639f5041164d5a85373e0f2875ec4b24370974f7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document functions as a link farm, containing numerous URLs that point to compromised websites and potentially malicious content. The presence of these links suggests an attempt to lure users to external sites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://nomylo.ru/uplcv?utm_term=navneet+guide+pdf+std+12+science PDF link annotation
    • http://sakem.org/userfiles/files/tikeligagux.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16082fb7d447e9---muxufajuduvowixudo.pdfIn PDF document text
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/gelu5v3bn1ldk2cp0oef2ftnu1/76491001352.pdfIn PDF document text
    • https://sancarspune.com/wp-content/plugins/super-forms/uploads/php/files/712d78a8c6097d72d16b214057b9d2ed/mezofofazo.pdfIn PDF document text
    • https://www.freshstartdigitalmarketing.com/wp-content/plugins/super-forms/uploads/php/files/54a482aa64d0c107d89fc1c6c2d16755/menug.pdfIn PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/90827dd10788cd79a463adffcdbc14ca/kezipeboxolusebumipa.pdfIn PDF document text
    • http://xn--tnqz8hz5cb8l.com/upload/files/52337188866.pdfIn PDF document text
    • https://vildmarksjagt.dk/userfiles/file/wopojololo.pdfIn PDF document text
    • http://spalovnachemolak.sk/userfiles/file/54535921141.pdfIn PDF document text
    • http://zartmobilia.com/userfiles/file/20210520060703.pdfIn PDF document text
    • https://liur-krd.ru/userfiles/file/82370765836.pdfIn PDF document text
    • http://hrudolf.com/userfiles/28543423240.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610d350b0b976---48560358572.pdfIn PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076dba1421a6---69004136361.pdfIn PDF document text
    • https://langumeistras.lt/i/File/javonomuju.pdfIn PDF document text
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/b9191fb240f1c29567b5e790d8c738fd/kolivog.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/a9658fecb1eb3b67239b7fbeaa5d2c32/9470490649.pdfIn PDF document text
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/77647e5942b14793e7350923921d755c/82701192865.pdfIn PDF document text
    • http://lifemartrealestateconnect.com/wp-content/plugins/super-forms/uploads/php/files/q3c73vg4af3a913vr2271ls661/pezunuvunonewirasonojoji.pdfIn PDF document text
    • https://www.asahinafunnels.com/wp-content/plugins/super-forms/uploads/php/files/lfg3q1gf603pacvaqag7nub9n4/ramabexumibi.pdfIn PDF document text
    • http://karate-talence.com/newsite/userfiles/files/8322273839.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/16070228d88671---27432193365.pdfIn PDF document text
    • https://micast.de/wp-content/plugins/super-forms/uploads/php/files/mtv3hqdtv3kk41irh4fn61hni2/wopereluloruxumiwani.pdfIn PDF document text
    • http://itkaufmann.com/images/fckimages/file/47815070306.pdfIn PDF document text
    • http://www.vandiestbrandstoffen.be/uploads/files/wiwupunemaxozisejilejadon.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cdb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDB2 19260 bytes
SHA-256: d0bcaaf591c5bdae38a105204e9fc2611dd35cd9908b84c245244800faac66db
font_01_sfnt_off0000ff83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF83 10844 bytes
SHA-256: c11e059048966a3be9d2d882aa7b50b3950a3e677870d90370eb9c2bd68336f3
font_02_sfnt_off0001189f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1189F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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