Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ff562bc4e8e210c…

MALICIOUS

PDF

104.5 KB Created: 2021-08-02 22:52:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 7418e0941151d56519b4dd7ecf3534eb SHA-1: 0a26c84762b9bbb3f3b0239d4fc41e3c3bf8c322 SHA-256: 7ff562bc4e8e210c2fd737db60ea07ff780a735bd4362a77d2244cf5365610c5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites, likely serving as a link farm to host malicious files. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. While no scripts were directly extracted, the structure suggests it's designed to redirect users to these compromised hosts for further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9858

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b2efef501f0---62440842466.pdf In PDF document text
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/9stvju1kfvnvhqq991kvhlvdrf/89527011065.pdfIn PDF document text
    • http://marcobernini.it/userfiles/files/38579097800.pdfIn PDF document text
    • https://acronimocostanzo.com/userfiles/file/ravirifazoregeworobud.pdfIn PDF document text
    • https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/c7227985958d4d0be723d4beae61c190/2760927344.pdfIn PDF document text
    • https://www.mixedclass.com.au/wp-content/plugins/super-forms/uploads/php/files/k65tv205blvcfh2a3pj5jdmvr9/dekut.pdfIn PDF document text
    • http://shqinze.net/admin/upimg/file///koduxonifetuxifurod.pdfIn PDF document text
    • https://urbanplace.me/wp-content/plugins/super-forms/uploads/php/files/620a59e690f49747cc19c032d23e00cd/netazujad.pdfIn PDF document text
    • https://yingzhaoliuart.com/upload/file/36083274347.pdfIn PDF document text
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/v1onu6jfdfkvpujt4ol8b5qqp3/kutukikejujok.pdfIn PDF document text
    • https://juvelyrikoscentras.lt/Files/file/ledokanosusuz.pdfIn PDF document text
    • http://mindentudor.hu/userfiles/file/71024696780.pdfIn PDF document text
    • https://www.cibaospalaser.com/wp-content/plugins/super-forms/uploads/php/files/38gt470681l3lvktvdi9f8pu4e/mupidopopete.pdfIn PDF document text
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/1609f342e10b0c---punubevawelarukova.pdfIn PDF document text
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/c8521af44b1adb120ba19120efeb5fd5/mavesidiloja.pdfIn PDF document text
    • http://www.dj-csnl.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606ee9f7cdc58---xazamagovolurudepemogib.pdfIn PDF document text
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/324dfdc51c07e7488763839fc66b00f4/vuxudabebofetufibetepu.pdfIn PDF document text
    • http://patriabrno.cz/userfiles/files/mebonifon.pdfIn PDF document text
    • http://metall-press.ru/files/nojojagixurudipesotunosi.pdfIn PDF document text
    • http://614move.com/clients/4890/File/sinefajojapulu.pdfIn PDF document text
    • http://appartenvue.net/appart/upload/images/gopum.pdfIn PDF document text
    • http://asea-admin.com/_userfiles/file/20210522120023.pdfIn PDF document text
    • https://xn----7sbbjg7ctfs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/6396f91a255f184b13120ae7e94ba5c8/govif.pdfIn PDF document text
    • https://www.helpfulhunks.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607f78d727f95---kuburoparex.pdfIn PDF document text
    • https://immo-cjeanpaul.lu/userfiles/files/24357559205.pdfIn PDF document text
    • http://yangpupark.com/uploadfile/files/jepubutagixoso.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=restaurant+story+2+mod+apk+2019PDF link annotation
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00012b34.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x12B34 29492 bytes
SHA-256: 7026121663a6439609df0000b18a7f49e08a0a40b6ef48285e6577f2462b4720
font_00_sfnt_off0000f8c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8C4 20400 bytes
SHA-256: 417db794ea90a6ee777b1e237527370d6bef9f6e01eec94944dd55f3a8161aa2
font_02_sfnt_off00016084.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16084 11228 bytes
SHA-256: a8be5ab0a88ed776d04b6c96229a5793bb666da80c9da679d8c1ff13ad622bf6
font_03_sfnt_off00017afa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17AFA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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