Malicious PDF — malware analysis report

Static analysis result for SHA-256 e298fe2ba12bb017…

MALICIOUS

PDF

76.1 KB Created: 2021-09-06 00:14:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 481ed3fda70ca1952345d887c96efc17 SHA-1: a56b4e303d44f91ac8460edfd93c33caf7ef00ab SHA-256: e298fe2ba12bb01741c2df6a5dacf9944fcad00ae669b0c88f0e0ac5765fe9d9
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document functions as a link farm, directing users to numerous compromised websites and disposable hosting domains. The ML classifier strongly indicates malicious intent, and the presence of external URIs suggests the document is designed to redirect users to potentially harmful content. No scripts were extracted, but the overall structure points to a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 5

  • 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://pixomot.ru/uplcv?utm_term=nsdl+pan+application+form+pdf+new PDF link annotation
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160848c33c3c0a---fagevemokokukiguzakaxev.pdfIn PDF document text
    • http://feriaalainversa.com/uploaded/files/71272891265.pdfIn PDF document text
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/5789cf9e3504363f37453fe74ca5bfec/vilozalajujuxobu.pdfIn PDF document text
    • http://npxbyy.com/wang3_3_10_27/Upload/Upload/file/2021716202997754.pdfIn PDF document text
    • https://thekolkatapackersmovers.com/ckfinder/userfiles/files/zofisawabexogaru.pdfIn PDF document text
    • https://xn--z4qq44i.tw/upload/actfiles/10459050550.pdfIn PDF document text
    • http://mariautonoleggiomarsala.it/userfiles/files/21113063195.pdfIn PDF document text
    • http://nsdadventist.org/FCKData/file/vezutob.pdfIn PDF document text
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/52302dc9276ee5274afcc1af04069386/71616024895.pdfIn PDF document text
    • https://jjmassociates.com/wp-content/plugins/super-forms/uploads/php/files/47c0520668fc9da33626de7e08e53910/bavufopisutubulare.pdfIn PDF document text
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/u93c8aupud6gmg5c1rab65c25q/rusoruginirisibew.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160a3719970595---89735806028.pdfIn PDF document text
    • https://cyberbirddog.com/userfiles/files/xuforisafelikivod.pdfIn PDF document text
    • https://flvirginia.com/wp-content/plugins/super-forms/uploads/php/files/5307319a93e1a036f8c273ac89465101/79758877421.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096e899bc7e4---wuzegu.pdfIn PDF document text
    • https://bahia-group.com/ckfinder/userfiles/files/78283344981.pdfIn PDF document text
    • http://meuble-tunisie.com/userfiles/file/gafolotonotazobogurafimo.pdfIn PDF document text
    • https://securityguardsupply.com/php/uploads/file/72786547591.pdfIn PDF document text
    • http://runbo.net/upfiles/files/16249862363718.pdfIn PDF document text
    • http://biomassasia.net/data_ed/userfiles/file/vewifasepesi.pdfIn PDF document text
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160920f44cf599---wanaxumir.pdfIn PDF document text
    • http://chinocorporatechallenge.com/clients/6216/File/padijijalipigere.pdfIn PDF document text
    • https://2-view.org/home/view/public_html/ckfinder/userfiles/files/jazamebaruxebatimarimev.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_off0000c4de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4DE 10844 bytes
SHA-256: 37382ff64a81c75389490bcfdb57941638be19c16213412e516ef21d6cd5c492
font_01_sfnt_off0000ddf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDF7 17492 bytes
SHA-256: 0aaee5513b5fce266dd89c51d3330831a181c0e91f9c8f0c60972d9b19e6ca38
font_02_sfnt_off00010b15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B15 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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