Malicious PDF — malware analysis report

Static analysis result for SHA-256 44c6aace46c4c112…

MALICIOUS

PDF

76.5 KB Created: 2021-09-05 19:42:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: d715ba042525a148a9dc35a0e1cf9127 SHA-1: 48387fd8b9f41b6e0852d6b5a0e4e258cf48dadf SHA-256: 44c6aace46c4c112ce64c5cd91c745812e4207cf4e40d22cb58e8950103606aa
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, directing users to multiple compromised websites and potentially malicious PDF files hosted on various domains. The presence of numerous links on disposable hosting and compromised CMS upload storage suggests an attempt to distribute further malicious content or phish users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/h1iu5lkpgn8tlt4n0esn656ts2/50566278969.pdf In PDF document text
    • https://swalaya.in/userfiles/file/69427395145.pdfIn PDF document text
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161146ceea4a6c---sekuwigowilabu.pdfIn PDF document text
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/a43020007d0b05eeaedff7e18734ac2f/41560447748.pdfIn PDF document text
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160961ef8c03b0---42064090021.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/2it31i70chkj7pta78ip7kjca7/wakalap.pdfIn PDF document text
    • https://panegovernance.com/ourprojects/chowki/UserFiles/file/65966703773.pdfIn PDF document text
    • http://blankheich.de/images/uploads/file/rudojufuzazubudipazovel.pdfIn PDF document text
    • http://beijingbeat.com/contents//files/zibusawirixujilomerixisi.pdfIn PDF document text
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607ab77e7830d---kimedixofixinojoxa.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e97c3753428---93531538648.pdfIn PDF document text
    • https://art-eria.pl/mandarynka/pliki/files/96258700984.pdfIn PDF document text
    • http://lideparts.com/userfiles/file/1623867380.pdfIn PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/52cdf39c0a69091c1d7216acbdb8b82a/77946310074.pdfIn PDF document text
    • http://www.thunderesp.com/ckfinder/ckfinder.htmlfiles/vivepilexekefosowow.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b579eac4293---rudutoti.pdfIn PDF document text
    • https://xn--arbeitskndigungsrecht-best-5zc.de/userfiles/file/63094922061.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073cd415971e---kokopejiwanuvo.pdfIn PDF document text
    • http://lapawan15.com/shop/fck_file/file/fitovuravizepidadate.pdfIn PDF document text
    • http://zabradli-znerezu.cz/userfiles/file/melopilasozal.pdfIn PDF document text
    • http://alliance-ltd.com/userfiles/55125166506.pdfIn PDF document text
    • http://dolphinegypt.net/userfiles/file/tavumegase.pdfIn PDF document text
    • http://tubietelbar.hu/uploadfile/22338119181.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=sheet+metal+forming+basics+pdfPDF link annotation
    • 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_off0000c96f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC96F 16136 bytes
SHA-256: 6d5058dac7dadca105b7b91f88497a4a264214bfd9b5af81963ab76a6042bd9a
font_01_sfnt_off0000f2b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2B9 11284 bytes
SHA-256: 2d4124d1b4c66a8a1d78cb87f7d404758f1cb72389d226248b1dd459c18ab3bc
font_02_sfnt_off00010c93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C93 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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