Malicious PDF — malware analysis report

Static analysis result for SHA-256 9511e42eedab3f02…

MALICIOUS

PDF

75.4 KB Created: 2021-09-21 20:01:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: df60c8a7c8d30d8084f67272eea3c462 SHA-1: 48245f9cdda0e3c35979d10fe2b9045ea6b56884 SHA-256: 9511e42eedab3f0237658c78d188499152275bc9ea66fdee5f88bc698180b043
156 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious. It contains a link farm pointing to multiple domains, many of which appear to be compromised WordPress sites or disposable hosting. The embedded URLs, such as 'https://wastran.ru/uplcv?utm_term=android+code+for+network+settings', likely serve as lures to phishing or malware distribution sites. No scripts were extracted, but the structure and URL patterns strongly suggest a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://wastran.ru/uplcv?utm_term=android+code+for+network+settings PDF link annotation
    • http://aescantabria.es/upload/fckeditor/file///63843879237.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/16146f9df560fa---93005177576.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/161404eeead2a2---56009107254.pdfIn PDF document text
    • https://hram-uspeniya.ru/ckfinder/userfiles/files/42345587382.pdfIn PDF document text
    • http://gearcon-eng.com/file_media/file_image/file/kibizigewikibu.pdfIn PDF document text
    • http://nexxstep.nl/userfiles/file/gebuguxumanazi.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613daab4a6d56---zirujob.pdfIn PDF document text
    • http://artvideo74.ru/upfiles/files/54406918397.pdfIn PDF document text
    • https://rybczewice.pl/userfiles/file/lenetuwoliluba.pdfIn PDF document text
    • http://asirakademi.com/resimler/files/sogasi.pdfIn PDF document text
    • http://filippodelvita.com/demo/userfiles/file/wanujumeregalenazis.pdfIn PDF document text
    • http://cioccolatogallucci.it/userfiles/file/zutumilu.pdfIn PDF document text
    • https://farmacieitaliane.com/documenti/file/83936540675.pdfIn PDF document text
    • http://dungcubepgiangtrinh.com/webroot/img/files/famofinazoxi.pdfIn PDF document text
    • http://orvosvalaszto.hu/uploads/files/vonowerewetasogizev.pdfIn PDF document text
    • http://eurolocal.info/sites/default/files/images/file/19842768684.pdfIn PDF document text
    • https://reclamesticker.nl/images/uploads/file/In PDF document text
    • http://residencecarlofelice.com/userfiles/files/ragovoxomivosis.pdfIn PDF document text
    • http://studioguagnoni.it/userfiles/files/wupovatarufarimasimotajuk.pdfIn PDF document text
    • https://shindah.com/images/ckeditor_img/files/tajilelodomanijoragegi.pdfIn PDF document text
    • http://jinruily.com/UploadFile/file/20210901060528800.pdfIn PDF document text
    • http://briztravel.com/upload/files/davitabuwerevikefob.pdfIn PDF document text
    • https://bawauang.com/contents/files/7453551974.pdfIn PDF document text
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/161356fee306d5---vobobelapesabom.pdfIn PDF document text
    • http://www.trisad.kz/ckfinder/userfiles/files/pijedagamijokomavodero.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_off0000c553.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC553 16216 bytes
SHA-256: 2a67a7d64984cb34187588e4b80354747deb5a5ed97adee0c4f6ee4f7ce2e97d
font_01_sfnt_off0000ef57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF57 10604 bytes
SHA-256: e75a757337171c2c36e1e8f78273930534d78af51fb98a79e71267b9c6fbe45a
font_02_sfnt_off00010799.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10799 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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