Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6c7ed4ed1fffb32…

MALICIOUS

PDF

69.5 KB Created: 2021-09-29 09:54:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 9bd919675bbc1ab728682fe725add21e SHA-1: d4ff0eb1347f557a1acbab3b992fc6c698e2ced0 SHA-256: d6c7ed4ed1fffb327f8962b472d4c0d34da44476760a67401644d40b19c08ccd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. It contains numerous links pointing to various websites, many of which appear to be compromised or disposable hosting, suggesting a link farm or phishing lure. The presence of external URIs and link farms indicates an attempt to redirect the user to malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://oniceh.ru/uplcv?utm_term=how+to+unlock+mi+phone+after+factory+reset PDF link annotation
    • http://locke-3c.tw/uploads/files/202109040128345188.pdfIn PDF document text
    • https://jlgardner.org/home/jlg/public_html/ckfinder/userfiles/files/48513684889.pdfIn PDF document text
    • http://www.photonics-science.com/ckfinder/userfiles/files/ragigapujizabukeki.pdfIn PDF document text
    • https://weblative.com/wp-content/plugins/super-forms/uploads/php/files/q4j8hetcroai7o5s2ltsv6ephs/9926009889.pdfIn PDF document text
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/b2vgsu8m189bd8p032lgtfpnk7/jomeziwojoravixutun.pdfIn PDF document text
    • https://hearing-outlet.com/uploads/files/202109281828373988.pdfIn PDF document text
    • http://bigbazar.cz/is/images/FCKeditor/File/vobanitejudazuwokagixipa.pdfIn PDF document text
    • http://savytrading.com/userfiles/file/78574672077.pdfIn PDF document text
    • https://brothers-music.com/ckfinder/userfiles/files/77596342069.pdfIn PDF document text
    • https://pasarangroup1.com/contents/files/91200978147.pdfIn PDF document text
    • https://ddmmaze.altruistictech.org/documents/img/upload/files/33738655639.pdfIn PDF document text
    • https://full-flavors.com/img/Data/file/35783875977.pdfIn PDF document text
    • https://hantverksakuten.se/ckfinder/userfiles/files/59929094406.pdfIn PDF document text
    • http://avsa.org/sites/default/files/images/files/9657442739.pdfIn PDF document text
    • https://jungleflightchiangmai.jungle-flight.com/Uploads/files/fiposuf.pdfIn PDF document text
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/40594ds95khdqs27too4ctuh52/82515787810.pdfIn PDF document text
    • http://laboratoriologos.it/userfiles/files/lejiwoliropufo.pdfIn PDF document text
    • https://matricula.arendic.cl/files/jidopinebimurenemaxipisa.pdfIn PDF document text
    • http://gasthaus-steinkirchen.de/img/editor/file/gifusaraburozijosupe.pdfIn PDF document text
    • http://synagoge-stommeln.de/ckfinder/userfiles/files/zivodosodug.pdfIn PDF document text
    • http://ekonopuntos.com/campannas/file/66056166935.pdfIn PDF document text
    • https://senesi-sklad.cz/userfiles/file/pevibufulen.pdfIn PDF document text
    • 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_off0000b127.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB127 14940 bytes
SHA-256: aad1e93ce218a173f248479dfb2a776850a1fd90335901b69eadb557a1dd0fdf
font_01_sfnt_off0000d67c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD67C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ee93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE93 11128 bytes
SHA-256: f0a2a2eaeb18f813b41ecb5315df32c48c9aa544fa8363f057b18d7e771262e1