Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec1e978a9a09006e…

MALICIOUS

PDF

82.9 KB Created: 2021-09-09 18:08:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 258ce702d343a08fa867f7cec5240c65 SHA-1: 44f9d43afffd2f4a82d218a2f4c745576ad00d1a SHA-256: ec1e978a9a09006e49a898ded472b2b59bd7c3eafceaa1d95a4c8f3e7b7e837e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised websites, likely intended to trick users into downloading malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were extracted, the PDF structure and embedded URLs suggest a phishing or malware distribution lure, consistent with spearphishing attachments.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 https://coretry.ru/uplcv?utm_term=my+summer+car+free+download+apk PDF link annotation
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/28be1b0678bceb6e9c6ef32ee8a85c00/bonexuruk.pdfIn PDF document text
    • https://sieuthimaycafe.vn/uploads/file/35235771930.pdfIn PDF document text
    • http://yugang360.com/upload_fck/file/2021-9-7/20210907231520535241.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/161386742b1dbb---mifovog.pdfIn PDF document text
    • http://tandartsindex.nl/images/uploads/buxekefuvavuvadibor.pdfIn PDF document text
    • http://elazentrale.de/images/uploaded/file/74814871324.pdfIn PDF document text
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/77ee365365bff7417cc9f4955b24078f/lowoxizopasasusedobig.pdfIn PDF document text
    • http://chothuexehochiminh.com/userfiles/file/xukipokajuromiz.pdfIn PDF document text
    • http://sushinamu.com/uploads/files/kajekaxezule.pdfIn PDF document text
    • http://qapoll.com/2015/vat/upload/files/rimobodapilodizisoseg.pdfIn PDF document text
    • https://adminico.nl/userfiles/file/19457068342.pdfIn PDF document text
    • https://bcm.es/files/galeria/files/73208154385.pdfIn PDF document text
    • http://tnslib.net/userfiles/files/857364235.pdfIn PDF document text
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/0c6f4b66dbfcf721798dc4a885417f81/1084842898.pdfIn PDF document text
    • http://www.caslyn.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16133db795f732---rozewesosim.pdfIn PDF document text
    • http://xn--90aoa5aj.xn--p1ai/ckfinder/userfiles/files/32684283027.pdfIn PDF document text
    • https://breedlife.com/upload/files/rudajiguze.pdfIn PDF document text
    • https://uleiuri.ro/userfiles/file/bagexoxejedipodumukudilav.pdfIn PDF document text
    • https://mwasafat.com/uploads/files/85419377038.pdfIn PDF document text
    • http://businessdevelopmentcenter.pl/uploads/userfiles/files/bulevikoganubabirovez.pdfIn PDF document text
    • http://greenvisioninternational.gm/userfiles/file/xolivusupukedegigabura.pdfIn PDF document text
    • https://www.masismarketing.com/wp-content/plugins/super-forms/uploads/php/files/ad578a9c9e9f9b123999ef35b603ad2e/vixajodegajenamokiwe.pdfIn PDF document text
    • http://contactfm.be/userfiles/files/guzaluxogemiravozilepilad.pdfIn PDF document text
    • https://ghnservizi.com/file/rinebas.pdfIn PDF document text
    • http://stavo-bazar.cz/userfiles/file/17378267218.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_off0000ddfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDFE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f610.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF610 17972 bytes
SHA-256: b6efffd706be5d1f0f2d9d452eb2ddd986d1760422806056b743ae46e52b4fbe
font_02_sfnt_off00012475.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12475 10976 bytes
SHA-256: 117b3f8f1a7c5b42134d4bcf984d1884e97b914950bc9c46583bb4ad97262bf5

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