Malicious PDF — malware analysis report

Static analysis result for SHA-256 a456d09173190d83…

MALICIOUS

PDF

97.6 KB Created: 2021-06-29 00:33:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 80232caa3f255035727b6343c9c94928 SHA-1: 876acff7ab7d90c22b0c8b7394efea12b8076243 SHA-256: a456d09173190d83db864e5e2f744bcd79885f6b142e2c65f15308d2af4ec361
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links pointing to compromised WordPress sites, identified by heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM'. These links are likely intended to lead users to phishing pages or download further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

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 http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8a32d6967e---jozuto.pdf
    • http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c2de3d25e87---67899750830.pdf
    • https://jotelek.hu/files/file/47382882864.pdf
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608d60e2b0408---vubedut.pdf
    • http://asiadomainstore.com/userfiles/file/37585322063.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160714766a755d---7214860225.pdf
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/b66c14ca8274ab66dd46b99c481a3202/fomixasowufazivito.pdf
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/kffe217rq4icjgbc5omf7ejtfa/libopadogipatubewu.pdf
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/160904e4def5a6---mewapobitif.pdf
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/1608229097cd22---75830624469.pdf
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/b125f7c28efec5d8fb8b9185d3bdb382/xipatodomevilivuj.pdf
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/bb91604e3fcc538d5bc9bb3f4ef2f1d0/pogutomaxeguk.pdf
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/12e78d3b232f2d160373785f2c58c7f0/nubefotovobibedajumogivej.pdf
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609d34ee6a0ce---84300609715.pdf
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/7q1mq6r9j3ojcabuvpnvhbu607/rededezubutadesarivi.pdf
    • https://brandonsmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/m84spv79eq4l2b61sgoessbmd4/lutelitezowek.pdf
    • http://work4shop.cz/userfiles/file/65846810128.pdf
    • http://promador.pl/userfiles/file/dinufolifuxegafirazigaraj.pdf
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/160983d1a36947---tepurubabu.pdf
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/c025f2c8fc65f1bb5e85df0b431eb2f7/34452838385.pdf
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16077be10211ed---riwaweguzudowonedekepi.pdf
    • http://pvsystexperts.com/wp-content/plugins/super-forms/uploads/php/files/ieneevl9sitjn2tvduq49ao1j7/34600890331.pdf
    • https://webupdate.ca/wp-content/plugins/super-forms/uploads/php/files/fs4tshl5bpnpcfbar3ngnurbv5/92787645775.pdf
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/720ee0d440f7aacc627f944e9f09e455/57520961371.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=good+recovery+wishes
    • 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_off00011d6f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11D6F 16792 bytes
font_01_sfnt_off00013581.bin
5b89516fb0ed4784a06023378a0e2c7a9e4f9244007c033bb091f5dc8f1ed50d
pdf-font-stream PDF embedded font (sfnt) at offset 0x13581 16956 bytes
font_02_sfnt_off000161d4.bin
d188db013f54d3122ae6d7f2732ca655764c397a66e6e0bea32e3fb58703d617
pdf-font-stream PDF embedded font (sfnt) at offset 0x161D4 10364 bytes