Malicious PDF — malware analysis report

Static analysis result for SHA-256 95fcabcc6cb2577e…

MALICIOUS

PDF

83.5 KB Created: 2021-08-23 19:29:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 2a6885ff4ae3b821bd14a6fe03fb0dcf SHA-1: 2092ff2cfd1c9158d6d649df2c73da379561fc2d SHA-256: 95fcabcc6cb2577e81d564f1421a61d76729f3167040128ad8014b2f89a7b320
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent. The primary attack pattern observed is the use of a link farm to direct users to potentially malicious content, likely a phishing lure or a download site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9944

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://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/4f061e31a6a96d5558b87c2ff5b7c295/68998190649.pdf In PDF document text
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f76c5e0a78e---lejuxowasububokunujaget.pdfIn PDF document text
    • https://weddingitaly.jp/images/file/67248713885.pdfIn PDF document text
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1611bac0495552---80024925395.pdfIn PDF document text
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/1606d527e100e8---wedaviselenuwinuwujimo.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/1609c445592b08---79751699070.pdfIn PDF document text
    • https://baongochoa.com/upload/file/pajifoxeduwosorixun.pdfIn PDF document text
    • https://cottonweb.net/userfiles/file/23314286228.pdfIn PDF document text
    • http://kiavysocina.cz/UserFiles/File/bogefutokurito.pdfIn PDF document text
    • http://alexanderkanevskyartistbiography.com/clientMedia/file/2908557948.pdfIn PDF document text
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/lrohgjcn5g74a4dsbqi0m0racp/3343007605.pdfIn PDF document text
    • http://cloverpark1960.com/clients/1/17/17c242f0968dc4bce059666b43fbd075/File/ramipami.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/cp1t2o8j1msd7op02k4m9d0tnv/84237449482.pdfIn PDF document text
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/fogln803jisdkvgigcm4r8rj8m/98268974538.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1611a33566e71a---xuvejadijitewepumurug.pdfIn PDF document text
    • https://genegurumiraclehealer.com/userfiles/file/nofanofewulevixafovovi.pdfIn PDF document text
    • https://maggies-handmade.com/UserFiles/files/xumubamarebuvaveburi.pdfIn PDF document text
    • https://functionalmovement.gr/wp-content/plugins/super-forms/uploads/php/files/96cd2562a2ff2ff38183164e686e984b/16279542130.pdfIn PDF document text
    • http://adbuilder.at/ckfinder/userfiles/files/80425729103.pdfIn PDF document text
    • http://peak-experience-europe.com/images/blog/file/10347550336.pdfIn PDF document text
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/iq6foekpahtj2moejahtad8o4m/20004548653.pdfIn PDF document text
    • https://alternativecarrepair.com/userfiles/file/83026705252.pdfIn PDF document text
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/160705fe2b5e8e---14865583168.pdfIn PDF document text
    • http://jyjwqj.com/uploadfile/file///2021060302583863.pdfIn PDF document text
    • http://tokyoracing.hu/userfiles/file/demorawuvivovikojexaz.pdfIn PDF document text
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/630151910a29f1ca4407715eff476948/jomisiju.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=chocolate+stocking+fillersPDF 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_off0000e0dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0DD 10736 bytes
SHA-256: f56ad4884e51f7ac4c4c83bc95079014fad8bfcccb76294006cb7625edfc41fb
font_01_sfnt_off0000f986.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF986 17128 bytes
SHA-256: 8225aae070beea3c692fba571096b751cec44409dedcfa0208aadc648a281c67
font_02_sfnt_off0001261d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1261D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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