Malicious PDF — malware analysis report

Static analysis result for SHA-256 8758aa2ece8a070e…

MALICIOUS

PDF

83.5 KB Created: 2021-09-20 02:14:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 97c58aec281945752811bc6e341b5855 SHA-1: 810572871749a2566d5b5abbd01188ea063f60fc SHA-256: 8758aa2ece8a070e9cb01c12e36a37ccb78c3182d15b9e97e9e0f7fa6c6c1c6e
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URLs, many of which point to compromised or disposable hosting. Heuristics indicate a link farm designed to redirect users, with one URL specifically mentioning 'how to get free cod points warzone ps4', suggesting a lure for phishing or scamming. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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 https://crewmak.ru/uplcv?utm_term=how+to+get+free+cod+points+warzone+ps4 PDF link annotation
    • http://meijialx.com/ckfinder/userfiles/files/6082281380.pdfIn PDF document text
    • http://heaig.org/editor/ckfinder/userfiles/files/zanirafemazalapazizewi.pdfIn PDF document text
    • http://gulfcoastlist.com/userfiles/file/funijerosadegobosavep.pdfIn PDF document text
    • http://irk-yoga.ru/upload/files/dudatufanalivasuzi.pdfIn PDF document text
    • https://study-abroad-travel.com/ckfinder/userfiles/file/pidoxisomifule.pdfIn PDF document text
    • http://dienlanhtruongson.com/upload/files/berepejudulazifeminexop.pdfIn PDF document text
    • http://www.hgekc.com/media/userfiles/file/tapomesefiwojuxusavo.pdfIn PDF document text
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/161417d60d7d34---60721991334.pdfIn PDF document text
    • http://dotykbylinky.sk/_subory/subory/guxomiwi.pdfIn PDF document text
    • http://townofwinslowin.com/flash/townofwinslowin.com/file/wababufo.pdfIn PDF document text
    • https://eastmangroupllc.net/ckfinder/userfiles/files/kexofepitiji.pdfIn PDF document text
    • http://border-collie.ru/sites/default/files/file/95707299559.pdfIn PDF document text
    • http://polenes.cl/userfiles/file/tajenopunosexelulotufep.pdfIn PDF document text
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/962208b52f9d58b2d656f8bfdced46f1/dufatotitaniro.pdfIn PDF document text
    • http://viacaosaopedro.com/www/js/ckfinder/userfiles/files/xolafavupudomifesadon.pdfIn PDF document text
    • https://posaonakosovu.com/ckfinder/userfiles/files/tenoxuroseluz.pdfIn PDF document text
    • https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/adec3aec7435ad1c1ff453ef7a64ef8c/gumugilivi.pdfIn PDF document text
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/40d68d707fbfde57ac306a8038ad0cdc/ruwaruxoxizatafafa.pdfIn PDF document text
    • http://cybernet-ap.com/UserFiles/File/3888024013.pdfIn PDF document text
    • http://sartoriaventurini.com/userfiles/files/suvunutufa.pdfIn PDF document text
    • http://rintoyo.com/userfiles/file/lofejunepeko.pdfIn PDF document text
    • http://gbfrjournal.org/pds/userfiles/files/19453417711.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_off0000ddc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDC9 10964 bytes
SHA-256: 4a32bcfcdf96878274406ea92ae32d24ff86fc11236ddaa11697a561f5eff1df
font_01_sfnt_off0000f742.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF742 18492 bytes
SHA-256: 63bb1c4c2622363ddb66f7ac6bf0d0a582ae0acbdc271c518bce2e7932a994f7
font_02_sfnt_off0001280a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1280A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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