Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc847c7750b46dab…

MALICIOUS

PDF

106.6 KB Created: 2021-06-26 04:23:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a2b45e69655d71ce16fa392563fb0a7b SHA-1: a12cc4467a5d435585f7d5d0f06e747ad9eadea2 SHA-256: dc847c7750b46dab23a91f6944b905e37b3924ea44441a1a608596a49e15f08a
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains embedded JavaScript and numerous external links, many pointing to compromised WordPress sites or disposable hosting, suggesting it functions as a link farm for phishing or malware distribution. The presence of embedded JavaScript indicates an attempt to execute malicious code within the PDF viewer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9868

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://midlandhigh65.com/clients/6/68/682e31fde28f8c6bff7ebba57332ef5f/File/9310614970.pdf
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/h62brh5ksleo8ho4vhck6solu6/jijupitisikopagonidejufas.pdf
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b2b771142f2---lanoraxuvexodewal.pdf
    • http://olympusflights.com/files/files/kegetubufixafivagebaga.pdf
    • http://kcde.kr/userfiles/file/bisez.pdf
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160763e093f146---87197383944.pdf
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607bbdf95922b---27745329616.pdf
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/gch7st4dvp4lr8ri5k4756ae0s/89009085254.pdf
    • https://cspdental.com/wp-content/plugins/super-forms/uploads/php/files/9774a9b256070668855c8c5fb0b510a3/volikolasoxin.pdf
    • https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/de42c73e71b5a2523e46d1317d444550/26375474689.pdf
    • http://alexanderkanevskyartistbiography.com/clientMedia/file/54195899609.pdf
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608a7c79880e1---semajerumuzaxosirem.pdf
    • https://vinadesigndanang.vn/uploads/image/files/78509575321.pdf
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607614fa2e9ef---begalejezovimutufu.pdf
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/1609796d0ac3b3---64974160562.pdf
    • http://arredamentoambienti.it/img/file/31453427917.pdf
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a6b98700336---saxewu.pdf
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606d3afd60238---7377205069.pdf
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c853730f068---48973045736.pdf
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609401357ddf5---kozomelepope.pdf
    • http://saamfactory.com/wp-content/plugins/super-forms/uploads/php/files/94d1a7b3938257e126396a2ed1e76fa7/lusirenefukijawubofoxe.pdf
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/dfae3dfa9aa3aaf97b1670f7b5646a28/29843880647.pdf
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/27704d5ce84858e76c46a12b875922b5/xugunibonoz.pdf
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c8ef9c8e5e2---32358537978.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=reoccuring+anal+fissure
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001274f.bin
68e0db7cb71f6c983e85813fd87a8abde7f94d23ec8de6e0fa2742887b34eb9d
pdf-font-stream PDF embedded font (sfnt) at offset 0x1274F 18168 bytes
font_01_sfnt_off000156ca.bin
eb83fb48a2f60ac59fad768156047f025764cad4052c8f34695a9c8dd2456ad8
pdf-font-stream PDF embedded font (sfnt) at offset 0x156CA 16132 bytes
font_02_sfnt_off00016c3b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x16C3B 16792 bytes
font_03_sfnt_off00018452.bin
e929d045ddab5fe46d27aba0f21a1a4c2755ec77b903a007a061ef1a3aaecd03
pdf-font-stream PDF embedded font (sfnt) at offset 0x18452 10556 bytes