Malicious PDF — malware analysis report

Static analysis result for SHA-256 f374122dba05ca9e…

MALICIOUS

PDF

72.7 KB Created: 2021-09-22 18:19:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 0cd5cfa8fa7d9fd0094ab94aead55013 SHA-1: 0fcc5299982e0a320749d4d4702dccf8bf188625 SHA-256: f374122dba05ca9e1d304b11337f4b0fd11588f11ad22d62c8b6997ea9740175
156 Risk Score

Malware Insights

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

The PDF file contains a link farm with numerous external URIs, many pointing to compromised CMS upload storage. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The document body is unreadable, but the heuristics and URLs suggest a tactic to lure users to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9915

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 http://tao-oita.com/admin/upload_filesfile/gekosixuwitebes.pdf In PDF document text
    • https://madeinstlucia.com/userfiles/files/zijemolaba.pdfIn PDF document text
    • http://ulrike-mayer.de/userfiles/files/gozosajafukusorojej.pdfIn PDF document text
    • https://408of53crownstreet.com/assets/media/files/babekevevuma.pdfIn PDF document text
    • http://tortsurprise.ru/upload/redactor/files/tavovufewa.pdfIn PDF document text
    • https://istanajpdua.com/contents/files/12093406508.pdfIn PDF document text
    • http://nghiencuuykhoa.com/uploads/userfiles/file/vofiwatunigarudovotemulu.pdfIn PDF document text
    • http://hongdacable.com/d/files/2202807956.pdfIn PDF document text
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/6248f7af3a8e61bca1793172c93f10cd/ritesosadaxa.pdfIn PDF document text
    • https://kurishupally.org/userfiles/file/44147125334.pdfIn PDF document text
    • http://foodzipo.com/uploads/userfiles/files/lotozujokipufifo.pdfIn PDF document text
    • http://softtox.pl/new/userfiles/file/mijere.pdfIn PDF document text
    • https://corpusbg.com/files/fck/file/vekokatelawilamuturotu.pdfIn PDF document text
    • https://bosgo.mn/uploads/files/womibi.pdfIn PDF document text
    • http://jan-fotografie.nl/upload/files/3832857763.pdfIn PDF document text
    • http://latiendasegura.com/contable_prueba/userfiles/file/76494010250.pdfIn PDF document text
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/hfpue1kgrjnnu6jf6qergc0jc5/webejevibubefiz.pdfIn PDF document text
    • http://shinex-auto.com/userfiles/file/kakilarazejenuvopazusu.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/161319c7186bae---lokaxamerefebekutase.pdfIn PDF document text
    • http://flashdisplay.net/UploadFiles/FCKeditor/20210921203406.pdfIn PDF document text
    • https://sunrise-photon.com/upfiles/editor/files/mewokikuju.pdfIn PDF document text
    • http://france-ex.com/images/blog/file/fumomidon.pdfIn PDF document text
    • http://pressvaluation.net/FCKeditor/editor/filemanager/connectors/userfiles/file/xotaxasazogikezo.pdfIn PDF document text
    • https://pastelbuilders.com/userfiles/file/94970474088.pdfIn PDF document text
    • https://amigo-shop.105h.net/upload/files/wopunobipuveluxakufozetok.pdfIn PDF document text
    • http://tourhong.com/FileData/ckfinder/files/20210922_60A149FEC4954236.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=love+action+drama+songs+download+mp3PDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000babf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBABF 15668 bytes
SHA-256: 0993dfa9c7172071f755913412b72b2124ebb49d8aa0a7887935d6a18c85ce4b
font_01_sfnt_off0000e2b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2B5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000facc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFACC 11140 bytes
SHA-256: 5592e38c9b0ed4928d39d722050071601754b9f721a08902ede9f15793d82a96

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