Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8386e01fb58962c…

MALICIOUS

PDF

76.8 KB Created: 2021-09-07 00:13:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 848e4d1d9b5e06ca303e7a4b5bdf0e2a SHA-1: cf45da79d954e8f77cbca26d663aee1411de756d SHA-256: d8386e01fb58962cec90b1d9b580148e5de5c17f6c5b8552a55337b50450dc8b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, many of which point to compromised WordPress upload directories or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. ClamAV and ML classifiers strongly indicate malicious intent, classifying it as a phishing trojan. Although no scripts were explicitly extracted, the nature of the URLs suggests potential for further malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://alakharia.com/public_html/userfiles/file/29956244405.pdf In PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/ndkspmr55oq9po7439o1mq4po2/91826190328.pdfIn PDF document text
    • http://diagnosticaedilizia.com/userfiles/files/5932175812.pdfIn PDF document text
    • https://skatrip.com/basefile/skatripcom/files/muvamemofo.pdfIn PDF document text
    • http://nutricion-intravenosa.com/wp-content/plugins/super-forms/uploads/php/files/1f2d18a45f15d2a4546cdaed306a986f/mevabura.pdfIn PDF document text
    • https://ddshower.com/ckfinder/userfiles/files/61639563005.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cd98d18d83---fajudosepom.pdfIn PDF document text
    • https://genesislighting.net/wp-content/plugins/super-forms/uploads/php/files/f5a286d88b642721791af14f0bee701a/20025271391.pdfIn PDF document text
    • http://magicdiscoradio.hu/userfiles/file/14159446927.pdfIn PDF document text
    • http://asiadomainstore.com/userfiles/file/pibigugawum.pdfIn PDF document text
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/futis.pdfIn PDF document text
    • https://akproauto.com/nbloom/fckuploads/file/77891816697.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160746da77c7ed---13296320570.pdfIn PDF document text
    • https://speakingparrot.com/upload/ckfinder/files/67044090391.pdfIn PDF document text
    • https://www.poolsrus.com.au/application/third_party/ckfinder/userfiles/files/mazediburinevo.pdfIn PDF document text
    • https://mkycc4.com/kycc4.com/userfiles/files/lesuwogefodimezaf.pdfIn PDF document text
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/912c10b95f7d745e2bb71f25e50e1774/guvofibesu.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/160737656b775c---togelukoxulux.pdfIn PDF document text
    • http://aaaexpressheating.com/userfiles/file/togizatizazawer.pdfIn PDF document text
    • http://www.clc-engineering.com/siteuploads/editorimg/file/57022587060.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1608c7fa38c773---risuluvuzafojureto.pdfIn PDF document text
    • http://razaviota.ir/basefile/razaviotair/files/20337155226.pdfIn PDF document text
    • http://akademibt.com/resimler/files/wobirobupesukijasig.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=pulgadas+a+mm+pdfPDF 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_off0000cafa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAFA 16952 bytes
SHA-256: efc3fd37602ce781db8d3ce4bd77e76db0a13f5f762296179631f13569f9f823
font_01_sfnt_off0000f6be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6BE 10296 bytes
SHA-256: 045aa92917453422e9d050259ed13c5526a4bee00794e7d86700a0e7e0e27672
font_02_sfnt_off00010db7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DB7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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