Malicious PDF — malware analysis report

Static analysis result for SHA-256 4031bf600ea6077b…

MALICIOUS

PDF

86.6 KB Created: 2021-08-08 10:01:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 9fd418a125df1754203bcde58faf2c74 SHA-1: 50a7449e1ae4959f613eec089207e59f2080e393 SHA-256: 4031bf600ea6077b558191b4877d138e267ccf17c5ce53fe6c42bc3873c3580d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for Pdf.Phishing.Trojan. The document functions as a link farm, directing users to numerous compromised websites and disposable hosting domains. These links are likely intended to facilitate phishing attacks or download further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://huntic.ru/uplcv?utm_term=en+maima+peru+anjala+naa+song+download+mp3+free+download PDF link annotation
    • https://useoneconvo.com/wp-content/plugins/super-forms/uploads/php/files/dc2cba0a5a1398abebbf16f77400e30f/dexuper.pdfIn PDF document text
    • http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b5527754bea---52888164624.pdfIn PDF document text
    • https://aordonez.com/images/contenidos/files/65894023170.pdfIn PDF document text
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/tlbv0l9q0jt7p4fssc866i8gmq/vibofuwiv.pdfIn PDF document text
    • http://sambometal.com/dataroom/file/98850830024.pdfIn PDF document text
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/33873tjc3kpriu2f2gh9g887s4/rodavoxe.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088eecc1cfd1---63274278419.pdfIn PDF document text
    • http://dichvugiayphep.biz/upload/ck/files/samofitovalegoxogipi.pdfIn PDF document text
    • https://www.autodepotperformancegroup.ca/wp-content/plugins/super-forms/uploads/php/files/4tjb2vgvlri35qmp4hphmdnja3/wuwutemimekopamerijudurax.pdfIn PDF document text
    • http://zabradli-znerezu.cz/userfiles/file/bufikobedebomatewatu.pdfIn PDF document text
    • https://www.northernillumination.com/wp-content/plugins/super-forms/uploads/php/files/b8ff61bf7f321abc3b7ae2904c7f716e/7896128871.pdfIn PDF document text
    • http://crosswaysrecruitment.com/userfiles/file/zudufiso.pdfIn PDF document text
    • http://bmhs1963.com/clients/7/72/7286fd37811b7a5dece6e69924e4d5ab/File/90885681114.pdfIn PDF document text
    • https://fl-forever.com/upfiles/editor/files/95184467801.pdfIn PDF document text
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/8bbb0eb467319bb1b1ef87da18d5585c/55002310163.pdfIn PDF document text
    • https://www.schroedersales.com/wp-content/plugins/super-forms/uploads/php/files/a26efa2cc29b7c5051513a4d8ce4ee16/fuxowizinibu.pdfIn PDF document text
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/vbgf22b2d52bj3qvr02q0627pj/67783956584.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c85392e474d---dowuzav.pdfIn PDF document text
    • https://teamcode.net/upload/files/26062756024.pdfIn PDF document text
    • https://carmelocuritiba.com.br/ckfinder/userfiles/files/23635728251.pdfIn PDF document text
    • https://www.myosiaffiliate.com/199trust/img/file/debegemedafanalorumoma.pdfIn PDF document text
    • http://cfh2.com/clients/d/d2/d2a7b52150a7a947468b52e9b7560e3c/File/muzuvovawerifuputo.pdfIn PDF document text
    • http://globaltruthmediagroup.com/clients/a/aa/aa8380eac451876ae6ab993bf3a720d6/File/vixejo.pdfIn PDF document text
    • http://pokorny-podlahy.cz/UserFiles/File/balinax.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB89 11216 bytes
SHA-256: 74f5d9d5cf4932592daa45a9485b96544948be7447711e424e45ad097b22599e
font_01_sfnt_off00010585.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10585 17564 bytes
SHA-256: 9f964e1ae74a77aade638baa5666fc881607c93bfeb325b2f64cf1f536d21741
font_02_sfnt_off000133c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133C4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1