Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea2fa3bbb488bc0b…

MALICIOUS

PDF

74.2 KB Created: 2021-09-21 22:15:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 6bade3b08ee840e93bffab1e24db77f8 SHA-1: a17dd124673efa4cd796066fb57e02ec8eac9626 SHA-256: ea2fa3bbb488bc0b6824a8e3f66ccfd65703c80475f44f8bce09e27b297509c6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a link farm with numerous embedded URLs, many pointing to compromised WordPress sites and disposable hosting, indicating a phishing or redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lead users to malicious content or further compromise.

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 http://kleinschaden.expert/userfiles/file/jujobijinotenawowirad.pdf In PDF document text
    • https://tonere.shop/app/webroot/files/userfiles/files/marumizigigu.pdfIn PDF document text
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/3f52bba4b0bcaa32c8701169eb1f894f/92555869504.pdfIn PDF document text
    • https://g55net.com/webpagebuilder/ckfinder/userfiles/files/vafafedaz.pdfIn PDF document text
    • https://31app.com/userfiles/file/penokorudurim.pdfIn PDF document text
    • http://haustechnik-hagenauer.at/tunojigabemunatulizaxe.pdfIn PDF document text
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/049e2fe968a8498b338090b17559f8fc/53646830475.pdfIn PDF document text
    • https://electroagro.es/pub/files/nogokepirolojafijig.pdfIn PDF document text
    • http://ptktent.ru/userfiles/file/51209260692.pdfIn PDF document text
    • http://onnetsolution.in/userfiles/file/40029970213.pdfIn PDF document text
    • http://nbnjl.com/userfiles/files/7604713157.pdfIn PDF document text
    • http://eskuvotoszkanaban.hu/editor_up/33397920259.pdfIn PDF document text
    • http://jamalcar.com/userfiles/file/wenujiwexazekosepemo.pdfIn PDF document text
    • http://myconnect-thailand.com/image/upload/File/resarowi.pdfIn PDF document text
    • http://mecaniquekd.ca/upload/file/lijisowewagobizule.pdfIn PDF document text
    • https://autoandtruckrepair.net/nbloom/fckuploads/file/vimejodugoxigi.pdfIn PDF document text
    • https://inprovitcaribe.com/ckfinder/userfiles/files/lotufexofemubifigagigiw.pdfIn PDF document text
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/d4npn5pngt8bt64kps6tl6shgd/64034490573.pdfIn PDF document text
    • http://lev-steklo.ru/userfiles/file/ruludedararaza.pdfIn PDF document text
    • http://skazka76.ru/pic/userfile/mipelositevagizolerimose.pdfIn PDF document text
    • https://aalatour.com/basefile/b2caalatourcom/files/58927780198.pdfIn PDF document text
    • http://covina.crazyrockinsushi.com/uploads/files/zamezo.pdfIn PDF document text
    • https://srldirect.com/ckfinder/userfiles/files/74405516368.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=csgo+clicker+unblockedPDF 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_off0000bc5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC5D 17956 bytes
SHA-256: 5e2554b56c67f2b2d37bb524d44ea5ce756e31cd275d57c302b7f2200bd6602a
font_01_sfnt_off0000eb8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB8A 10648 bytes
SHA-256: cf3b4215108e6f3c515bb8a8920c9f40fb05fa99285192d230d091b5fdcb0e87
font_02_sfnt_off000103c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103C4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1