Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e0ea011b7e0ae63…

MALICIOUS

PDF

82.7 KB Created: 2021-09-15 19:53:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: cbc0c9f4be95972bc3c85777a7e79f25 SHA-1: befdb61fb67260926aca379c138d0272c21cdcfa SHA-256: 5e0ea011b7e0ae635ce9fb2f45a766d129b94e40ae15a38bf6eaf4802241e565
156 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous URLs pointing to various domains, many of which are hosted on compromised CMS upload storage or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The presence of external URIs and link farm heuristics suggests an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://nofatrans-int.com/userfiles/file/vezuti.pdf In PDF document text
    • https://bodymason.com/user_uploads/files/gevotazofamudovavagutar.pdfIn PDF document text
    • http://intimatehotelpattaya.com/image/upload/File/kuwotikafiboledesumidibap.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614146aee0962---guzuwojudog.pdfIn PDF document text
    • http://chinalanpa.com/images/upload/File/20542914177.pdfIn PDF document text
    • https://detmers-kontejner.hr/files/45270567994.pdfIn PDF document text
    • https://windfreeklima.com/upload/ckfinder/files/gupogekulasazotoxewo.pdfIn PDF document text
    • http://bretagne.annuaire-regional.com/ckfinder/userfiles/files/duzuwis.pdfIn PDF document text
    • http://sandsflooring.co.uk/ckfinder/userfiles/files/tibuxawudagiju.pdfIn PDF document text
    • http://aprt1day.ru/file/vajulitomamor.pdfIn PDF document text
    • https://www.la-providence-ehpad.fr/ckfinder/userfiles/files/43489298369.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/161385c8c1bb07---vizogiwi.pdfIn PDF document text
    • https://vili-al.com/uploads/wysiwyg/files/20906328952.pdfIn PDF document text
    • http://thebookmarkcafe.com/uploads/files/47325922168.pdfIn PDF document text
    • http://tandartsindex.nl/images/uploads/wisuramurawewezawexuj.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/161408f52af5d8---vatetijeli.pdfIn PDF document text
    • http://app0.linkeo.it/ckfinder/userfiles/files/xovibosoxogevunegiro.pdfIn PDF document text
    • http://gcsiva.com/files/userfiles/file/29861155030.pdfIn PDF document text
    • https://beautydiction.com/ckfinder/userfiles/files/tesolabu.pdfIn PDF document text
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/96b59cb48dd003c9d1debbb93c2cc4ab/kixaxidukavibas.pdfIn PDF document text
    • https://greenways.at/userfiles/file/timisu.pdfIn PDF document text
    • https://absoluteanytime.com/media_file/files/files/dodomivodogisobagisafu.pdfIn PDF document text
    • https://geneolock.com/ckfinder/userfiles/files/sitiw.pdfIn PDF document text
    • http://stin-verdon.fr/assets/Image/files/wegumem.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=sito+per+scaricare+app+android+gratisPDF 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_off0000dd16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD16 10716 bytes
SHA-256: 5b33dbc05e2ed9370342390f665a6323e6761239afdc5e7f08e053b4c27cb2b1
font_01_sfnt_off0000f59b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF59B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010dad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DAD 17476 bytes
SHA-256: 1f9f3179764c2ec35dda31255779c2d7a64ae696ce2dea32fca8f7fb0e78d676

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