Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0ea419e23d062e3…

MALICIOUS

PDF

81.4 KB Created: 2021-10-05 05:15:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 116394ea2a7616da9cde7e964f48253c SHA-1: 471ec98bdae2c69b76c27815317906c7e78f7cdf SHA-256: b0ea419e23d062e3797b569cfc3aed0cdb3ee7919c8c0027b901a61a63c09ec0
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external files, many hosted on compromised or disposable domains, suggesting a link farm designed to distribute malware. The 'SE_INVOICE_LURE' heuristic indicates the document's content is intended to deceive users into downloading malicious files, likely by impersonating an invoice or payment request. ClamAV detection and ML classification confirm the malicious nature of the PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://juncheng.tw/upload/files/84187590266.pdf In PDF document text
    • http://soundspace.eu/Upload/file/bisevug.pdfIn PDF document text
    • https://wronba.pl/uploads/wysiwyg/file/96322645081.pdfIn PDF document text
    • https://agencement-menuiserie-var.fr/stockages/files/32953387442.pdfIn PDF document text
    • http://holzbau-napetschnig.at/vinujuzuxitoram.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16151be0ecef9a---4482508998.pdfIn PDF document text
    • http://euro520.net/userfiles/file/1632294922249833552.pdfIn PDF document text
    • http://www.greenfield-sustainability.com/images/files/86278871246.pdfIn PDF document text
    • http://wordtmann.beckbauer.eu/ckfinder/userfiles/files/63114649192.pdfIn PDF document text
    • https://kstraders.com/userfiles/file/pakisajifam.pdfIn PDF document text
    • https://calson.garment-pro.com/ckfinder/userfiles/files/figomajulutijata.pdfIn PDF document text
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/32c5566e9dca4e90633e6a4f65e791a4/56524718849.pdfIn PDF document text
    • http://oodow.cn/upload/file/210921062612137714szkiocgisr6i.pdfIn PDF document text
    • http://jiachuankeji.com/upload_fck/file/2021-10-2/20211002225936691553.pdfIn PDF document text
    • https://poulinstrapscan.com/userfiles/file/41378076798.pdfIn PDF document text
    • http://kencert.vn/uploads/image/files/26343743558.pdfIn PDF document text
    • https://alternatifhirdavat.com/upload/ckfinder/files/773610417.pdfIn PDF document text
    • https://tannhatviet.vn/upload/files/72185215931.pdfIn PDF document text
    • http://odessawa.com/userfiles/file/59006287390.pdfIn PDF document text
    • http://savitaco.com/uploads/images/files/rusojisewepazi.pdfIn PDF document text
    • http://drigungkagyurinchenpalbarling.org/upload/userfiles/files/12476162934.pdfIn PDF document text
    • https://myarchitect.es/ckfinder/userfiles/files/95865022471.pdfIn PDF document text
    • http://boathousebrokerage.com/userfiles/file/88966566236.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16141d339b9055---23183236923.pdfIn PDF document text
    • http://chinamakina.com/userfiles/file/11257391831.pdfIn PDF document text
    • http://balcimimarlik.com/resimler/files/56241699737.pdfIn PDF document text
    • http://www.itidharamshala.in/images/uploads/files/volinelinidavop.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=income+and+expenditure+account+isPDF 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_off0000d99d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD99D 10780 bytes
SHA-256: 1ad2738c73de451989023919ba2f50098e241c60f8dd9da9dfaa0bba2d07eead
font_01_sfnt_off0000f26f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF26F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010a81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A81 17324 bytes
SHA-256: 5546c5d02fe8316767c8268b13748fc1913e664ae484c0efa0ed2fa08a0b0db1

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