Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ce460f3c14da4f4…

MALICIOUS

PDF

87.0 KB Created: 2021-08-17 22:07:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 14d4860e6a525a979e68e9e538dfbf05 SHA-1: a1074379cba169dec9baedbd17523ccc256f5d9b SHA-256: 0ce460f3c14da4f49984faff59bf64fb29169cd7fae862e409737ca37e70ce46
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a link farm with numerous URLs pointing to various domains, many of which are hosted on compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/160ade54ccbf95---30281480997.pdf
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/1609a8bfde3945---3620393084.pdf
    • https://sportsslife.net/upload/ckfinder/files/87078085290.pdf
    • http://horizonpestservices.com/userfile/wivegozagobotikuvoris.pdf
    • https://clickkedai.com/userfiles/file/45066267896.pdf
    • http://benardoutlite.com/admin/fckeditor/fckdata/file/pagovukebirapijisizor.pdf
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/99254d82d39c46b86693c7a710728c59/gopufasopefuwaxasuvi.pdf
    • https://nomaquito-travel.com/editor-images/93767905741.pdf
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160869976b5d89---rozuvivodudukijaponi.pdf
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/b6b3a576d4d5c08c95a4a94693a0ea86/8876038730.pdf
    • http://sgyscom.com/upload_fck/file/2021-7-24/20210724172027851675.pdf
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b9ed0d9a0d7---94924455560.pdf
    • http://smsgurugram.com/miet/assets/files/16735190099.pdf
    • http://beloit1962.com/clients/8/83/8368a4f838dea3176655029ae9e337da/File/refezepidodok.pdf
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/1d59f643e2dcd9d228164f40d0bcdffa/kunazafuzipeje.pdf
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160966f491bbbd---99698339803.pdf
    • https://listapp.in/ci/userfiles/files/8955200895.pdf
    • http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b93fe98972d---rakojawijuzika.pdf
    • https://boucherienabli.com/uploads/FCK_files/file/tovevemewij.pdf
    • http://avtokit116.ru/!upload/files/91525340630.pdf
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1f6f95e9e1---14469696957.pdf
    • https://hopadive.cz/ckfinder/userfiles/files/93993528788.pdf
    • http://gilendor.cz/userfiles/file/88160509948.pdf
    • http://chukgoobok.com/files/fckeditor/file/zejukoj.pdf
    • https://istocdukkan.com/userfiles/files/73903042127.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=coin+master+hack+apk+ios+download+2021
    • http://irodori.kir.jp/files/file/disabodoruzo.pdf
    • 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_off0000ee4b.bin
5d9ffcc183f6854a7c5efa59179e3b89dc21eaa9bc3f00dcf2ed400a03e6149a
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE4B 17444 bytes
font_01_sfnt_off00011bab.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11BAB 16792 bytes
font_02_sfnt_off000133c2.bin
4dd9a948e4bb0f3372b17bd41b4aab28a5e42eb00674e76d26ac68da0330e28d
pdf-font-stream PDF embedded font (sfnt) at offset 0x133C2 11284 bytes