Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5a557819972ef20…

MALICIOUS

PDF

82.3 KB Created: 2021-09-11 23:58:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 25c78c008c5e67fd58f23daa94a5b3a1 SHA-1: 57a3af9b314cecc4db94d26d6515d90d564ed0fe SHA-256: d5a557819972ef20b8091a53cef9e7fc3e31ac7ad80b94327037ec5176d8c277
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. It contains a link farm pointing to multiple compromised WordPress upload directories and disposable hosting sites, suggesting an attempt to distribute malicious content or phish users. The presence of embedded URLs and the nature of the link farm indicate a likely spearphishing attachment attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://daulte.com/ckfinder/userfiles/files/jugofinetelutiwomubo.pdf In PDF document text
    • http://longarmquiltacademy.com/fckeditor/userfiles/file/88398411687.pdfIn PDF document text
    • https://hmanagement.net/userfiles/file/26162726455.pdfIn PDF document text
    • http://skazka76.ru/pic/userfile/58441932730.pdfIn PDF document text
    • https://sledovani2.gpshlidac.cz/www/userfiles/files/65427716072.pdfIn PDF document text
    • http://harchovyk.com/userfiles/file/jabeporemapokitu.pdfIn PDF document text
    • http://www.moyekolodin.com/files/luwedodi.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/ca825670f5bae6cc6f12de35e1429ae7/39100616403.pdfIn PDF document text
    • https://nutritie-metabolism-sanatate.ro/app/webroot/files/userfiles/files/38718242080.pdfIn PDF document text
    • http://ammk.sk/userfiles/file/kozipufilakawavobip.pdfIn PDF document text
    • https://jairdefreitas.com/ckfinder/userfiles/files/51461727786.pdfIn PDF document text
    • http://yey.uw52.com/upload/files/magigofuparorekozuresev.pdfIn PDF document text
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613034ff10b9d---63651478668.pdfIn PDF document text
    • http://www.santabriganti.org/admin/ckfinder/userfiles/files/rigikawalefakut.pdfIn PDF document text
    • http://wellgroup.cz/UserFiles/File/desipe.pdfIn PDF document text
    • https://solelane.com/ckfinder/userfiles/files/89120490866.pdfIn PDF document text
    • http://realtor-madrid.com/uploades/fckeditorfile/kipanezuvilezarow.pdfIn PDF document text
    • https://gilboamedia.com/userfiles/file/reguxafugupiku.pdfIn PDF document text
    • http://flyingwedge.com/uploads/assets/file/febuzosaguwuzepijerefed.pdfIn PDF document text
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/6fb47f303c50aa29f0e47794289d305e/87165139418.pdfIn PDF document text
    • http://ingore.cn/upload/files/demazejopiterivazi.pdfIn PDF document text
    • https://snqrsl.quebec/upload/editor/file/49626875852.pdfIn PDF document text
    • https://turismo-galicia.es/ckfinder/userfiles/files/10097984090.pdfIn PDF document text
    • https://actsonics.com/uploads/files/202109031929579993.pdfIn PDF document text
    • http://delfosventures.net/userfiles/files/doretunofel.pdfIn PDF document text
    • https://rm-parketi.si/uploads/nerumifilixivurepereno.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=android+auto+download+apk+mirrorPDF 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_off0000df7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF7C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f793.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF793 10512 bytes
SHA-256: f496da8f05e21b67dcf319874607546aa89ffcc7d48e3e4ad326621bb469ff6c
font_02_sfnt_off00010f78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F78 17144 bytes
SHA-256: 6fc1767282156299aad23eb315dceabb7082985ac0a33d0b45ed5b00642362af

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