Malicious PDF — malware analysis report

Static analysis result for SHA-256 a45a39e95c09d8d2…

MALICIOUS

PDF

79.4 KB Created: 2021-06-30 08:12:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 6ec15cea1a2026781561b14050f92fd7 SHA-1: e5ae6484d9471324c7c20488a53c4aa3bb440c45 SHA-256: a45a39e95c09d8d2d9cb03869fc57382a13ef0c8dbcd468f5207daa24b440440
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as 'Pdf.Phishing.Trojan'. The file contains a link farm pointing to multiple compromised WordPress upload directories and other disposable hosting, suggesting an attempt to redirect users to malicious sites. The presence of these links indicates a likely phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/df57f37c55804d95ec983a263e4e45f4/devemoxutogojuzepi.pdf In PDF document text
    • http://jevades.com/aircraft/fckimages/file/21082204642.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/1607a186027742---bojirug.pdfIn PDF document text
    • https://mut-zur-veraenderung-hambuch.de/userfiles/file/paxurifakamaku.pdfIn PDF document text
    • http://gdlianyu.com/uploadfiles/file/jutemovagugek.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16094dc279f4a3---vaperot.pdfIn PDF document text
    • http://thedigitalscorecard.com/userfiles/files/zelunokajapobodivunopibuf.pdfIn PDF document text
    • http://kopdesign.nl/userfiles/file/50632925693.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/malan.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cd5780700f7---gorovuwimafogegugumubo.pdfIn PDF document text
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/0a2e944398813092d8899fa76aa037eb/narikulilebab.pdfIn PDF document text
    • https://service-panev.com/userfiles/41127254962.pdfIn PDF document text
    • https://cwlighting.com/wp-content/plugins/super-forms/uploads/php/files/412a2d640e029e086a602b74368d934b/8683470935.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a07c605c999---37772186957.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c553895a3d6---77803732122.pdfIn PDF document text
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/198aa2cc7cc2fc14831cf7309b8050a5/7597874252.pdfIn PDF document text
    • http://scuderieverdina.it/scuderia/userfiles/file/41574210384.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc1281e5550---mefobiwaginofarekimet.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/16089096d7ab98---46945847649.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/2054be6082045160234b2cfd23dc6fd1/bimazagowabogud.pdfIn PDF document text
    • http://enjoy.sk/editor_uploads/system/files/venaxegimejolawole.pdfIn PDF document text
    • http://hanarotalk.com/userfiles/file///nekejawifaxes.pdfIn PDF document text
    • https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160b3f65a345d9---xalegagadupebokawedojo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=chicken+in+satay+sauce+chinesePDF 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_off0000d735.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD735 10400 bytes
SHA-256: 139c352684ea4129e53ab3f1caf048b87de33db346aaa5db03b5de66d1f86829
font_01_sfnt_off0000eeca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEECA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000106dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106DC 16092 bytes
SHA-256: 22546e48a0b2996439022d33a6b8678625f9111c86de8f85e44b1fe2abeb80bd

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