Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8ed9ac51db0e70a…

MALICIOUS

PDF

231.8 KB Created: 2021-06-29 08:46:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 836d5b83d53d97d50240aa324aa618d5 SHA-1: bdfc089506152fb1851bd1e7b33388ccc27441ff SHA-256: a8ed9ac51db0e70acbcd2a5ae78a820d8c59f82929574672fb52709110556c47
106 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The document exhibits characteristics of an advance-fee scam, using lures related to lotteries, prizes, and parcel delivery to deceive the user. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest potential malicious activity, possibly involving the download of further payloads or redirection to phishing sites. The ML classifier strongly supports the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9868

Heuristics 5

  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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.
  • 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://casier-a-bouteilles.fr/file/96621234667.pdf
    • http://thehigh86.com/clients/13680/File/51980304202.pdf
    • http://lynxitservices.com/ckfinder/userfiles/files/mulabojawanozunekabojat.pdf
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/v8qie3c4jqc99h6o2rlkdiskl5/gulazeron.pdf
    • https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/af2cf67322310bc273fa83db28f10322/pabopepadusitunewo.pdf
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/bcdde47bc333099a0edce026ba1d8a0a/xekapufutepotaruxuk.pdf
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/b897l5kvui1huk9pl9bakmvpk0/xodaroza.pdf
    • https://xlspandoek.nl/userfiles/file/godeleralugulavulefuk.pdf
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/fe9acd92c290eaabddf3cfaf8d47e77b/mebonujezapabawaz.pdf
    • https://viboot.com/ckfinder/userfiles/files/mejuladaveparoxiworab.pdf
    • http://dent-pro.cz/pic/file/gadevatitufitigukukenovu.pdf
    • https://foundryindia.org/userfiles/file/xabibewomebadefi.pdf
    • http://hytechplus.com/userfiles/file/fovemubevelisavikixaw.pdf
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c2319f142e3---puvowidatojaxodexijamofu.pdf
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16096f03c48134---53941735155.pdf
    • https://luyenthitoeic.info/userfiles/file/nawinomowo.pdf
    • http://signexpowholesale.com/project-new/christianbook/upload_images/file/gigewesiboderevuzelete.pdf
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/vmg85ee1t81sg7obdd9aq0ajb0/18771040429.pdf
    • http://suapaiatuipelehakefamily.com/clients/80707/File/sufometotezavep.pdf
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609688479ca22---31325059502.pdf
    • https://sckprime.com/wp-content/plugins/super-forms/uploads/php/files/06052a2ed70cc6f016155d42dad07108/5144101764.pdf
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/16096022370253---52836385186.pdf
    • https://culturasiapamplona.com/guiarte_userfiles/files/vidogasojaro.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=bruce+almighty+script+pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • 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_off00032e9f.bin
67da4feb9f6ab8993faac90ae3bbc96748d0fcb2861bfddc18ca05ab51100284
pdf-font-stream PDF embedded font (sfnt) at offset 0x32E9F 11108 bytes
font_01_sfnt_off00034864.bin
d56be882aca6249deab9d23cf1dcbf94181fbbafe82c250ce5ca3356b771f0b6
pdf-font-stream PDF embedded font (sfnt) at offset 0x34864 18816 bytes
font_02_sfnt_off00037953.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x37953 16792 bytes