Malicious PDF — malware analysis report

Static analysis result for SHA-256 05d298fbdfdbb7f2…

MALICIOUS

PDF

89.3 KB Created: 2021-06-29 07:14:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 2b066c8f0cd3481dde76cda95a4036aa SHA-1: 9b1fa695f38ff6461dc144efa718f268d6f8a6af SHA-256: 05d298fbdfdbb7f2fba6cf61112b70b34be910c4ee03dda5bdca5fc962e50e9f
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it is likely a phishing or malware distribution lure. The file contains numerous embedded URLs pointing to compromised WordPress sites and disposable hosting, suggesting it functions as a link farm to redirect users to malicious content. No scripts were extracted, but the primary attack pattern involves directing users to external malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9932

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ketchas.ru/uplcv?utm_term=use+of+a+an+the PDF link annotation
    • http://rahway1968.com/clients/5/53/53e48f2724afc57738bbbcfbfdbdad27/File/labaxesoremenujizaka.pdfIn PDF document text
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607baf3eef7ec---sotofikologedi.pdfIn PDF document text
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d68826b07f3---79843328400.pdfIn PDF document text
    • https://www.sehersirin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d9a70665ff---jagikojisigopuzubavaweg.pdfIn PDF document text
    • https://samsungdvmklima.com/upload/ckfinder/files/31676871469.pdfIn PDF document text
    • http://www.odnpoznan.pl/fotki/file/file/jukewaxupot.pdfIn PDF document text
    • http://gowowdeli.com/uploads/files/98973969126.pdfIn PDF document text
    • https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/d3df09f5b809ca4beb1f8ca7912fe25a/tajoses.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/vevawumarak.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607187cda6697---76504601703.pdfIn PDF document text
    • http://alliusie.com/userfiles/file/48774930339.pdfIn PDF document text
    • http://psychoterapia-przemysl.net/img/userfiles/file/36990848412.pdfIn PDF document text
    • https://empylean.com/wp-content/plugins/super-forms/uploads/php/files/18ijca20np30p0n06ian15q2fa/zugowazasap.pdfIn PDF document text
    • http://minhvuongthuphap.com/upload/ck/files/43662141243.pdfIn PDF document text
    • http://middlegeorgiacoinclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/160768927b922c---86514190059.pdfIn PDF document text
    • http://hongshengfish.com/uploadfiles/2021060408312461533.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a623a7f087c---55414966493.pdfIn PDF document text
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/3a9b770e378ff2042545767a04153c98/97704111217.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b3eea12ff7---gujifawa.pdfIn PDF document text
    • https://xn----9sbccjdbca7cyaieg1a3j.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/73187d184864b9a7b7889ce477a79bae/nikironutozewibawadep.pdfIn PDF document text
    • http://musorcentrum.hu/files/article/file/67370961357.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160a70d017594a---45377067209.pdfIn PDF document text
    • https://bookatowncar.com/userfiles/file/pufotitijoxi.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5D2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fde4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDE4 16880 bytes
SHA-256: fe80243d009e3fa9df3e079de48e565335739e9b9dd7091a6a89325a5273dcbe
font_02_sfnt_off00012983.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12983 10080 bytes
SHA-256: 72296c2aa9512779b69cce87677d001573768bee013a56befbdca596e712b846
font_03_sfnt_off00013ff3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FF3 16376 bytes
SHA-256: 0c133022d1e9883d2ff7035cf84f1fa0be9cfa0d671266bc5a940283bc0f9855

Open this report in the interactive analyzer, or submit your own file for analysis.