Malicious PDF — malware analysis report

Static analysis result for SHA-256 784990fa25ccdaa8…

MALICIOUS

PDF

95.0 KB Created: 2021-07-03 17:59:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: adfcc252050998848f4887db9d8c943f SHA-1: db172362a2e1e45640436da0999be9f2248c9896 SHA-256: 784990fa25ccdaa89cd931528c7e7f1c7f675cdc72b581f80fa192ca554ad53b
156 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. It contains numerous links pointing to compromised websites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the overall structure point towards a phishing or malware distribution campaign, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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 https://infrive.ru/uplcv?utm_term=5+main+branches+of+chemistry PDF link annotation
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/491d13ebbb2fa7aa16d58e1bfb054659/pokotuzamorerojatet.pdfIn PDF document text
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/b6ec64462515b01585b7cb23baed2c73/61272049790.pdfIn PDF document text
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093aaa2c3001---kunavezovabor.pdfIn PDF document text
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/9c3ac674a25e4684ff6e80e89d82dceb/27935396191.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c5f3411f23e---28469498583.pdfIn PDF document text
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1607fc2b10cb94---44006871365.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a092a7a0ce8---delesobupolu.pdfIn PDF document text
    • http://zuche0551.com/upload/file/52386494222.pdfIn PDF document text
    • http://gocreate.termall.pl/upload/fck/file/86603644666.pdfIn PDF document text
    • http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/160875ab000ff4---85245083613.pdfIn PDF document text
    • https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/rrk53s31e4jnmhokjbigd7vo1o/vesaletapadinikaj.pdfIn PDF document text
    • http://kengosushionlineorder.com/uploads/files/86949046334.pdfIn PDF document text
    • http://acupunctuuryao.nl/ckfinder/userfiles/files/fujorebiwikupuna.pdfIn PDF document text
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6be1e4af6e---lifudupu.pdfIn PDF document text
    • https://hagepoorter.be/files/files/zodekire.pdfIn PDF document text
    • http://eske.hu/wp-content/plugins/formcraft/file-upload/server/content/files/16074bf8d0a455---10472524769.pdfIn PDF document text
    • http://aeronautike.com/userfiles/file/67926705283.pdfIn PDF document text
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d0dacd692e---18265850504.pdfIn PDF document text
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/90chrgr2ul73qmqn46t723lgvc/98069036995.pdfIn PDF document text
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/5b21efa4cf9f734c751127fb029bb9db/gawiwawonus.pdfIn PDF document text
    • http://xn--rssx31a7tec6p.com/upload/userfiles/files/20210628120738.pdfIn PDF document text
    • http://microcement.ua/userfiles/file/rinufatexalaj.pdfIn PDF document text
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/3jtnot638duth6lva9vqbg26o0/78173497447.pdfIn PDF document text
    • https://lawina-radom.pl/files/file/54489883135.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_off000114d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114D5 10844 bytes
SHA-256: 0771727bc6535b493de545278de68bfb1d98e9c4c652578ae0fe10f196e65a24
font_01_sfnt_off00012db3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DB3 15936 bytes
SHA-256: 93ab1b5bdf4e2dff7b463f31f550705f0d7cfb0234bba51f0342e21b0368f04b
font_02_sfnt_off000156ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x156CA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.