Malicious PDF — malware analysis report

Static analysis result for SHA-256 825c204ba555345b…

MALICIOUS

PDF

100.7 KB Created: 2021-07-01 20:25:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: ba670f557bf5b7c1a7e030361f1f1727 SHA-1: 2f7b092aadff70e62131058f0b84d11215b35039 SHA-256: 825c204ba555345bf913cd803d634071b84f0036690c72f1467f7826367f2c50
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to compromised CMS uploads and disposable hosting, indicating a link farm designed for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and URL patterns are consistent with techniques used to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://sitebyside.ru/wp-content/plugins/super-forms/uploads/php/files/c57d6014d2a19a20893ed2cfd2c99ee7/xoteradegavogimudigasi.pdf In PDF document text
    • http://stylekd.ru/files/31738363642.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/160746c891e5e3---jorutezuvepegunodepaxaf.pdfIn PDF document text
    • http://altinay-law.com/images/file/38660507842.pdfIn PDF document text
    • http://danburyhighclassof1961.com/clients/b/b4/b42d7d7907ff1a67dd6fd366dd3c6775/File/59319725400.pdfIn PDF document text
    • https://holocaustresearch.pl/nowy/photo/file/xopemulaled.pdfIn PDF document text
    • http://spamsmsgiare.com/media/ftp/file/11322519660.pdfIn PDF document text
    • http://azizolace.cz/images/file/89185965440.pdfIn PDF document text
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160873b32976be---gapebuluwukilitiraw.pdfIn PDF document text
    • http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/160a1609b13cce---80982102464.pdfIn PDF document text
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/sgvrlqjhuhd6fr3gdfqc0nnsr1/besisudevunazemasuvojore.pdfIn PDF document text
    • http://beastyenergy.com/userfiles/file/pimesolulutodimejap.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c9445024af3---numem.pdfIn PDF document text
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/21aab213d0226561c7ed614f04d8b593/xawiwelomupetaluxovaxoral.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/f991eb745ce3e6a51dd91493c2152582/zalen.pdfIn PDF document text
    • http://chromowane.com/userfiles/file/gilemawudu.pdfIn PDF document text
    • https://ketdoanbus.com/webroot/img/files/31024093919.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cee93c7067d---xidixarepepakubifasuzotix.pdfIn PDF document text
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/3p8oen22597r9k4s2qcrvcv72k/65092494605.pdfIn PDF document text
    • http://sungsam.net/userData/board/file/wexigidifowa.pdfIn PDF document text
    • https://hirurgija.me//files/vobabasuseniduxaxob.pdfIn PDF document text
    • https://cmoretv.com/userfiles/67064535996.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=best+places+to+visit+in+jaffnaPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001255a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1255A 18492 bytes
SHA-256: 05abb9d5b052cd2cc3db2003aaf1099c464b76a19198138166dc6cca30a23f86
font_01_sfnt_off0001553b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1553B 10624 bytes
SHA-256: f20fd67d918489289a20749dd41da047f204bb4a798a8efc2be5c1f7129d213a
font_02_sfnt_off00016db2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16DB2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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