Malicious PDF — malware analysis report

Static analysis result for SHA-256 eddcc64f280c2ac0…

MALICIOUS

PDF

84.7 KB Created: 2021-06-30 04:17:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9eed01c3f9f9293f2da385cb073682db SHA-1: 098f30de04fbaaf3fb1412d9488b4993ddd20ba0 SHA-256: eddcc64f280c2ac05ec63a6ca06ced52ae4ff983c45d00673bd8fe2ef00fdfd7
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The file's structure as a link farm on disposable hosting further supports its role in distributing malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/banhgrnkh95b445h41omt3e4i7/77726076821.pdf
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083deed5adc7---nukaparugovasanosaxi.pdf
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a35a1356489---budutupeju.pdf
    • http://bigcool.net/webroot/img/files/saturasexu.pdf
    • https://astek-telem.fr/userfiles/file/67841384056.pdf
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16093090289cf1---15721097728.pdf
    • https://srp-galabau-rostock.de/wp-content/plugins/super-forms/uploads/php/files/4dtto001cu34qtlskp5798j17n/gopegipe.pdf
    • http://creaorganization.com/depo/sayfaresim/file/kibiziku.pdf
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/fq6sg0dnvv2cp7r62tgembqkg6/90275294593.pdf
    • http://mrsinternationalbeautypageant.com/clients/8/8c/8c0f0497d7166b07b5568c04be8084ca/File/44160487594.pdf
    • http://haniltm.kr/upfiles/editor/files/21912650313.pdf
    • http://clarksville.net/wysiwygfiles/file/pixame.pdf
    • http://pune-india.info/userfiles/file/18010913298.pdf
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/8b69b119575872abd243f25427ebd2fd/bejut.pdf
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c56de220141---41502863288.pdf
    • https://cor.org.ar/wp-content/plugins/super-forms/uploads/php/files/5dlihgd5jhddctjm5hrk5hkr09/xamawimokivizodisojefog.pdf
    • http://marinapogon.pl/upload/file/nimuj.pdf
    • https://claphamjunction.com.au/wp-content/plugins/super-forms/uploads/php/files/9b22469e23e896f42d20c54944785ff2/rezikofimekoboguribu.pdf
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d3c23a11ad---kavujotaloni.pdf
    • https://mamo-tato.ro/userfiles/file/32932312853.pdf
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160995a5ff1652---52148915956.pdf
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/d8d53ae156a7756ea1f5a499a8f964d7/57297014333.pdf
    • http://ipceurope.com/assets/file/jewanawa.pdf
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b64db95e4e5---20297710631.pdf
    • http://mikailang.net/userfiles/file/20210515113344_1606836875.pdf
    • https://perfecthospital.org/FCKeditor/file/61139236230.pdf
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/d9712188a111efffdae83028547d18c2/lesefik.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=derivation+of+pascal+law
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e803.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE803 16792 bytes
font_01_sfnt_off00010015.bin
09246183155ca51fc1b2af6d56a7070fdefb852d30d908696a9538c972bcf8da
pdf-font-stream PDF embedded font (sfnt) at offset 0x10015 17280 bytes
font_02_sfnt_off00012d1c.bin
b472535656377761ffb67c121ecb567bc09e6015b1c78fb31c4caa0ec295dcc6
pdf-font-stream PDF embedded font (sfnt) at offset 0x12D1C 10624 bytes