Malicious PDF — malware analysis report

Static analysis result for SHA-256 58ba0bb8b4498d2d…

MALICIOUS

PDF

78.8 KB Created: 2021-09-20 08:27:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 5d3582375f65e944edd146a4db378d01 SHA-1: db5e1903a0ca2e2f8ecbbcd4ca36a789db570ee4 SHA-256: 58ba0bb8b4498d2d8b79721902cf0feab27b3bc2ec3a84c7fd7c77d09aa0c415
156 Risk Score

Malware Insights

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

The PDF file contains a link farm, with multiple URLs pointing to external resources. Several of these URLs are hosted on compromised CMS platforms, indicating a potential phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://yejida.com/userfiles/file/fizum.pdf In PDF document text
    • http://modulobase.com/userfiles/file/47409523587.pdfIn PDF document text
    • http://cadelupo.it/userfiles/files/rurijaturama.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/161400c61a1130---72193232868.pdfIn PDF document text
    • http://jlm-kg.com/uploads/file/zokibulufifiduvujeto.pdfIn PDF document text
    • http://4bx.pl/public/file/20206688382.pdfIn PDF document text
    • http://tongshengchem.com/ckfinder/userfiles/files/92834856847.pdfIn PDF document text
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/a65a4583f6f445fe2cc7b46725b0b7df/zujejibitarol.pdfIn PDF document text
    • http://www.bluewhaleline.com/image/upload/File/tasakimitod.pdfIn PDF document text
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/451b67854680522a4d901e142cfe0ff3/76718565162.pdfIn PDF document text
    • http://unsersohn.ch/images/file/17860286741.pdfIn PDF document text
    • https://bangvetthuong.com/luutru/files/48008659622.pdfIn PDF document text
    • http://royalwedding.jp/images/blog/file/23271275986.pdfIn PDF document text
    • https://srilangkapools.com/contents/files/58952477266.pdfIn PDF document text
    • http://mcutech.net/files/98450274830.pdfIn PDF document text
    • http://condominiobrisasdelnorte.com/userfiles/file/rasepilikero.pdfIn PDF document text
    • https://tourpon.kr/FileData/ckfinder/files/20210917_9BBD8B21DBC09ED0.pdfIn PDF document text
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/05d02d9ede53619435acdc5a08072529/83745226024.pdfIn PDF document text
    • https://dcimx.com/files/xojamiwukize.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16134900117467---35311337757.pdfIn PDF document text
    • http://edallyshop.com/upload/files/47772523457.pdfIn PDF document text
    • http://eptesteplelek.com/uploads/file/jovagasoloxesitagore.pdfIn PDF document text
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/79d33e4777bc5eace1ee10c98195f967/jagarinisil.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132833796fc3---zopoxelez.pdfIn PDF document text
    • http://xn--80aaa1acmiejxr6d7fg.xn--p1ai/data/files/31378487441.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=sarileru+neekevvaru+full+movie+watch+online+with+english+subtitlesPDF 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_off0000cc84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC84 11344 bytes
SHA-256: 418fca1814169c96ae2adb9ed4f3089a7d33b759d8d76135e8ad5d71eeb10ddf
font_01_sfnt_off0000e714.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE714 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ff26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF26 17492 bytes
SHA-256: 15908f094c0f5d4edb23d7684e1fc0020d250877a56a8a25ce6987b8b58c2bd7