Malicious PDF — malware analysis report

Static analysis result for SHA-256 08f5371114b35043…

MALICIOUS

PDF

82.6 KB Created: 2021-09-01 17:43:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: e120eac71f7236b9656b6fb4c7abb2c5 SHA-1: 237d2176c8015b709ad8dd7c98a9d6cf0478a301 SHA-256: 08f5371114b350434b08498249df7d4c1d42a5a03c4ceb618eda82cad3ad673b
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, many of which point to potentially compromised or disposable hosting sites, indicating a link farm or phishing lure. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were directly extracted, the presence of multiple PDF_URI heuristics and the overall structure point towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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 http://sevinctekstil.com/resimler/files/61805887895.pdf In PDF document text
    • http://salondebellezaanamariaromero.es/ckfinder/userfiles/files/mubazolagejokoloti.pdfIn PDF document text
    • http://weifong.tw/fckimages/file/bopurepipedorijikevidi.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/cd5e6cb6b9beec97b54b8359ef93fe90/mozoz.pdfIn PDF document text
    • http://buyyoutubelikes.com/ci/userfiles/files/kedulamobunida.pdfIn PDF document text
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/5c23853738ea23d646c700d331123941/tirefabilopavitogagekeni.pdfIn PDF document text
    • https://dusunceokulu.net/resimler/files/nokefogetijoxitetexam.pdfIn PDF document text
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/1612f8ce02ca17---25215233107.pdfIn PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/u8ie957p74iqc2gqj7b5gg19h7/jurinuvu.pdfIn PDF document text
    • http://ambulanceservice.pl/userfiles/file/tinonagemabepisave.pdfIn PDF document text
    • http://kssi.ir/public/userfiles/file/vopunizitutisupaxo.pdfIn PDF document text
    • https://geneolock.com/locktactyuma/userfiles/file/kezutulu.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c17b37edb59---56181259306.pdfIn PDF document text
    • http://mynigaoe.com/upload/file/20210701065737.pdfIn PDF document text
    • http://timeyear-v.com/userfiles/file/29006949128.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/160be4295dcd6d---lowabebolatufabebatamapig.pdfIn PDF document text
    • https://loctra.net/userfiles/file/54778675322.pdfIn PDF document text
    • http://140.121.180.103/ckfinder/userfiles/files/sofevuloxaxigif.pdfPDF link annotation
    • https://zoorichi.com/temp/fckeditor/file/40719060391.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/00n29sjdb6us61bs4avf3n4mt0/golizemedegejejuwenokop.pdfIn PDF document text
    • https://notrepanierbio.ch/userfiles/file/87727499578.pdfIn PDF document text
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/1608364af996bd---verowevokixowekarejo.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f1b31bab35---91715893514.pdfIn PDF document text
    • https://lexcyberia.com/userfiles/files/51648904178.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=residential+construction+performance+guidelines+4th+edition+pdfPDF link annotation
    • 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_off0000d9bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9BF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f1d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1D1 18388 bytes
SHA-256: 56fb692dd4c1f070a61137e26ea64fb70df9b04a74c7b3711560356a6f3eb2f7
font_02_sfnt_off0001222d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1222D 11288 bytes
SHA-256: 6810aa0c610587d26fbfc6a125b4d6ab876e3e0cd1c2b06fdd0a5cffef9b7e49

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