Malicious PDF — malware analysis report

Static analysis result for SHA-256 73e754f4f398dbe6…

MALICIOUS

PDF

88.9 KB Created: 2021-09-06 12:50:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: ac6a5ff19c7d1eec067c7b269e01c15b SHA-1: 3147342b334425692cd12d126dc8547d4ddfb800 SHA-256: 73e754f4f398dbe6ab4ac8c1efb7b1f51d2ec877c2bba6ac8ead0674a70e79a9
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains embedded JavaScript, suggesting it may execute malicious code or redirect users to malicious sites. The presence of numerous external URIs, many pointing to compromised WordPress sites or disposable hosting, further supports a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://spiregene.com/image/files/20210819_050631.pdf In PDF document text
    • http://ty-int.com/files/files/88124456689.pdfIn PDF document text
    • http://fygl.net/uploads/file/180855387799.pdfIn PDF document text
    • https://valstybestarnyba.com/upckfinder/files/sasemutodo.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160983c56491d1---wunes.pdfIn PDF document text
    • http://miwon.com.vn/app/webroot/uploads/files/tezibofuvewipulaxovibinim.pdfIn PDF document text
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/sj8u04b514lf69dpg8uq4c68a2/vijonururezusuxinak.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/pqoe94q1r8jlml7e4rpr6ncvut/79204374751.pdfIn PDF document text
    • http://nutricion-intravenosa.com/wp-content/plugins/super-forms/uploads/php/files/044a01fd22da9369bd993fe37c5bec55/lesonulevejizevekibe.pdfIn PDF document text
    • https://kheops-so.fr/ckfinder/userfiles/files/43874236559.pdfIn PDF document text
    • http://gildiamasterov.ru/userfiles/file/90497899593.pdfIn PDF document text
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ca0800def0---82914790032.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ff31d8a772b---82067994906.pdfIn PDF document text
    • https://an-professional.ru/img/files/file/sadekavoke.pdfIn PDF document text
    • https://chinatupai.com/web/js/ckfinder/userfiles/files/ditoduwubajunepevagebu.pdfIn PDF document text
    • https://diversified-nj.com/wp-content/plugins/super-forms/uploads/php/files/3d92b4cc0f3de3f2070df886137becac/pevotebuxoralil.pdfIn PDF document text
    • https://meesens.be/KrMee/Tekstverwerker/putagizejufatapom.pdfIn PDF document text
    • http://snuhonors.com/userfiles/file/28573901603.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/b61dd33195e3af5d48d73f10df454e56/93685771899.pdfIn PDF document text
    • http://baraanduliaptti.org/userfiles/file/77504874862.pdfIn PDF document text
    • https://norservis.info/files/files/jiwuwivitomewomeregodewi.pdfIn PDF document text
    • http://finproekt-msk.ru/userfiles/file/53523736295.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611df3d218c12---wozidiximusenurabiripam.pdfIn PDF document text
    • http://alnadaoil.com/userfiles/file/10033506146.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=american+standard+platinum+95+furnace+installation+manualPDF 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_off0000f1a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1A7 11164 bytes
SHA-256: dc3d7ac3be05c48abcc2fe2269e0e6d5818cd106952892df3b05ee35c975f0fc
font_01_sfnt_off00010bc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BC6 18908 bytes
SHA-256: 95ade9b9e21dc1512861171754273ccaf3b75339cf86a492b7ede91a8c654a09
font_02_sfnt_off00013d59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D59 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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