Malicious PDF — malware analysis report

Static analysis result for SHA-256 002cd5d4ea10dfc9…

MALICIOUS

PDF

81.8 KB Created: 2021-07-26 11:41:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f529101d65c695e38cf2f0e40ab98fa3 SHA-1: 73d0af04efed93c9b2223458201c6db15631fb17 SHA-256: 002cd5d4ea10dfc91dd865d15d295694aa87abe29b5408125aed2e338989a7ac
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm or phishing lure. The presence of embedded URLs and the nature of the heuristics indicate an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 http://renovfab-menuiserie.com/userfiles/file/redatuka.pdf
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/3af0264d10cec302a9bf9515d0aea8fe/36774097005.pdf
    • http://cloverpark1959.com/clients/51168/File/mevawarijoro.pdf
    • https://cuatudongbinhduong.net/uploads/files/foworinanozupewodewi.pdf
    • http://alpinist.store/sribati/editor/uploadfiles/lexajanepixefebikenojini.pdf
    • http://amandatravel.com/userfiles/file/31184272699.pdf
    • http://www.sandzthabapanel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160b97b857f3e7---ganazepefobulobupunul.pdf
    • http://www.allatpatikapecs.hu/images/file/xafirevelawu.pdf
    • https://0900107678.com/upload/file/73686885934.pdf
    • http://www.microsinusectomi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079972bbf4ae---vabikowopupokosusiro.pdf
    • http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/16070ef4c79348---denewelawojojokosesabir.pdf
    • https://coebmsf.com/userfiles/file/runifulitetubowozepegabaz.pdf
    • http://pvhs1967.com/clients/a/aa/aa78cb05297cd93d8a9ab6bd1eb8a3c4/File/susap.pdf
    • https://baoyi-chuck.com/ckfinder/userfiles/files/todarakuxasama.pdf
    • http://fructusartis.com/i/File/6471882965.pdf
    • https://pui-vital.ro/msg_media/file/16036876495.pdf
    • http://doks-films.com/pcms/content/file/sedodobukubu.pdf
    • http://venusland.vn/app/webroot/img/files/512320353.pdf
    • http://autoshiftbid.com/fckeditor/userfiles/file/katirexikakixu.pdf
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/h560bg55kimdm9v8uoei0evb59/93923607821.pdf
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607233db894c5---43438137700.pdf
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/9f6ad862ee671b705a14fea0740d2d3f/sikived.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=how+to+calculate+cost+of+life+insurance
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/c279574fdf17a1a73d371c645108be54/21817113441.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • 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_off0000e226.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE226 16792 bytes
font_01_sfnt_off0000fa38.bin
016bf3b2c41608dfb510731e6a009299fd4f67df0a59a831e94d6fc0cd1fb534
pdf-font-stream PDF embedded font (sfnt) at offset 0xFA38 16588 bytes
font_02_sfnt_off00012519.bin
c356af6a2b8da43f589c6a5b26b19a410d2b338df501255c495d1ad15d906bee
pdf-font-stream PDF embedded font (sfnt) at offset 0x12519 10508 bytes