Malicious PDF — malware analysis report

Static analysis result for SHA-256 e300366e8ad09292…

MALICIOUS

PDF

90.5 KB Created: 2021-07-02 08:01:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: b2e69b6daa3fbc0670dc1b754a46f696 SHA-1: e97b8f2b9ce7dea13e9ef3737941f68dc755f57b SHA-256: e300366e8ad0929283b100f1a978ed409c51eaa17a96b0ca0880b266a6cdbaac
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/16080baf8bb328---rivamixijewoxezigovus.pdf In PDF document text
    • http://akkoryazilim.com/userfiles/file/xipimividibudigelidole.pdfIn PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a68406c757d---81311044853.pdfIn PDF document text
    • http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/16096044de3fee---71043719752.pdfIn PDF document text
    • https://srp-galabau-rostock.de/wp-content/plugins/super-forms/uploads/php/files/5ktf8tj5c92v7p0rvu04dl0ri1/xejunik.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/pii9ev8gqdh83tum1h1nairos5/1475981936.pdfIn PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/209d1c14eaf8ff3284c248807377e1c0/99285584883.pdfIn PDF document text
    • https://a2designbg.com/userfiles/file/51095037426.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f8d8b9dd47---roxegexavuselaxe.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b20b24a5e5a---28730221627.pdfIn PDF document text
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/8905e24e09fa46935ae82c0a26b0b4fa/30769989378.pdfIn PDF document text
    • https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/msrdo0jn6rgfi0gc6n5dhr13u0/zizadujaxuba.pdfIn PDF document text
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/7apg1dd9p3e50ro4f5otf21gab/guxekofejukogum.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f39ecbc51d---82557502189.pdfIn PDF document text
    • http://dainichiji.com/upload_ckr/files/dejaganavod.pdfIn PDF document text
    • http://fygl.net/uploads/file/060341557380.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b220c8e69aa---68101959713.pdfIn PDF document text
    • http://decaiyun.com/upload/file/2106280930381433675t6m9y8e0nj6.pdfIn PDF document text
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/6697ee0a0125094fc36108eb4a22d87f/85777144802.pdfIn PDF document text
    • https://www.alignerco.ca/wp-content/plugins/super-forms/uploads/php/files/0fc6650ca2fd1541d98457eefad6ea13/49161419120.pdfIn PDF document text
    • https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/e53ec2bd0561ab6c748626acdf144234/vodav.pdfIn PDF document text
    • http://www.gcsystem.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1608790895b594---90587192183.pdfIn PDF document text
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/d7132190cb998cde4cb255f66571b79f/92290563623.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160d1f8d50a745---96095438073.pdfIn PDF document text
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7d89c3af4f---68283462768.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=breathlessness+and+shortness+of+breathPDF 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_off0000ff93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF93 10552 bytes
SHA-256: 5c57365ae096023a1de7c0ad6a1515f4b19e407dcd54a259a6bad1dae3cd52f5
font_01_sfnt_off00011796.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11796 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012fa8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FA8 17152 bytes
SHA-256: 5957f6c77f27784aba1f8766a6158e4de771e15f6651161fadb25be0bced442a