Malicious PDF — malware analysis report

Static analysis result for SHA-256 015cd6fecaf379a6…

MALICIOUS

PDF

85.6 KB Created: 2021-09-17 05:38:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 6b0c73247de51aed10a488e347bf4446 SHA-1: ad07b8bc8976b6decd738be973625c489fbe24a3 SHA-256: 015cd6fecaf379a6f22b9ffba56216ef839c4d3fda7ec64d3ee05d9159af1cdd
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which are hosted on compromised or disposable domains, forming a link farm. These links likely serve as lures to phishing sites or malware downloaders. The ClamAV detection and ML classifier strongly indicate malicious intent, consistent with a phishing or trojan distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 https://smidgel.ru/uplcv?utm_term=famous+android+games+2014 PDF link annotation
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/161362592daeb9---1785179423.pdfIn PDF document text
    • http://keitbg.com/images/files/25836248728.pdfIn PDF document text
    • http://studiomanzella.com/userfiles/files/virelefeza.pdfIn PDF document text
    • https://www.fishhabitatnetwork.com.au/application/third_party/ckfinder/userfiles/files/pejizoja.pdfIn PDF document text
    • http://easyreturn.store/userfiles/file/fosemenanunokeku.pdfIn PDF document text
    • https://joinvita.com/neu/userfiles/file/60063644014.pdfIn PDF document text
    • https://erdenetpost.mn/userfiles/files/lakesotavosexukijetixufu.pdfIn PDF document text
    • https://machnhaduong.com/images/uploads/files/44608643438.pdfIn PDF document text
    • http://aapltd.net/userfiles/file/70547122254.pdfIn PDF document text
    • http://phutunggiahungoto.com/uploads/files/demixoja.pdfIn PDF document text
    • http://cuborh.com/natelinhanew/js/ckfinder/userfiles/files/bubozobotomi.pdfIn PDF document text
    • https://computerzone.pk/file/97914933431.pdfIn PDF document text
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/e7c0ddbdb4e97d1d8d43a6c6fe26b802/48715644806.pdfIn PDF document text
    • http://styrexon.cz/userfiles/file/52583934946.pdfIn PDF document text
    • http://redemaisfarma.com/userfiles/file/midetagizubut.pdfIn PDF document text
    • http://architettosirocco.it/userfiles/files/50161015203.pdfIn PDF document text
    • http://snabsz.ru/ckfinder/userfiles/files/3178628119.pdfIn PDF document text
    • http://analhospital.net/file/files/gikew.pdfIn PDF document text
    • http://syntra.pl/userfiles/file/77265831365.pdfIn PDF document text
    • http://nordicwalkingturak.hu/_user/file/namirosagoger.pdfIn PDF document text
    • http://mawratanews.com/armedia/uploads/files/23950677884.pdfIn PDF document text
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/poicf2phil9g8q7ir3i1r9gb08/59597292825.pdfIn PDF document text
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/30e7fd7f2a63c647b7a89960979821c1/tixodanidebe.pdfIn PDF document text
    • http://siamintertrade.com/file_media/file_image/file/77870398005.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_off0000ec30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC30 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010442.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10442 17024 bytes
SHA-256: c39f649cf3844ed2e96c0b26ef7606de0ddec825f5d6df35922b6d836a108ee0
font_02_sfnt_off00013023.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13023 10896 bytes
SHA-256: aac55d717b3f7b2b491628877ab70c14370e7b86c37478d2997ce73b37de4b8e

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