Malicious PDF — malware analysis report

Static analysis result for SHA-256 08dde5a2ffd3921d…

MALICIOUS

PDF

75.3 KB Created: 2021-09-05 18:45:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 5c55d5c1a8ccccf8fded72a5196bdf6b SHA-1: e4b7913bd752fa6bd66e993d0182e944456122c6 SHA-256: 08dde5a2ffd3921d6e784839ae78801f5ed990205bae188a781412bf35deb96f
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The presence of multiple distinct hosts and the use of UTM parameters indicate an effort to obscure the final destination and track user interactions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 https://allytemp.ru/uplcv?utm_term=adding+single+digit+numbers+worksheet PDF link annotation
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb8bb342a92---miriliw.pdfIn PDF document text
    • https://candbco.com/ckfinder/userfiles/files/98584559918.pdfIn PDF document text
    • http://xn----gtbercbfedtm3b.xn--p1ai/admin/ckfinder/userfiles/files/bekota.pdfIn PDF document text
    • http://industrialsupplies.pk/userfiles/files/68937432048.pdfIn PDF document text
    • https://ivfnna.gr/wp-content/plugins/super-forms/uploads/php/files/47a1b918cc552f71954186b4c2eed8bd/33858700627.pdfIn PDF document text
    • http://bloomx.com/sites/all/sites/bloomx.com/files/49774178831.pdfIn PDF document text
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/6ad93f2d240523ed448f633ade517a4a/serubexivabobumujevu.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6be5bc1384---67247920310.pdfIn PDF document text
    • http://anhuizhkj.com/upload_fck/file/2021-4-30/20210430001940578442.pdfIn PDF document text
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2d6fe38499---69915557179.pdfIn PDF document text
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071dce42d154---66861218771.pdfIn PDF document text
    • http://cdmatik.com/uploads/file/novilamukizufatipudiw.pdfIn PDF document text
    • https://pabxlg.com/userfiles/file/88684116382.pdfIn PDF document text
    • http://cga82.com/admin/File/fowiwipusenabobo.pdfIn PDF document text
    • https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/a32344e913e4fc82ad4f1a84246083d8/fovul.pdfIn PDF document text
    • http://sunnysolutions.it/uploads/assets/file/jajurozifoxemew.pdfIn PDF document text
    • http://maxbrio.kr/files/files/bifazoridobuvumeguses.pdfIn PDF document text
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/u7k4hb63r3suqj149319o5lap4/sapufegixe.pdfIn PDF document text
    • https://orderpoet.com/ckfinder/userfiles/files/xovunetipanu.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/8f34982bc7b6005d8088939c65777563/75057408129.pdfIn PDF document text
    • https://dascalita.ro/app/webroot/files/userfiles/files/korol.pdfIn PDF document text
    • http://anhuizpyy.com/upload_fck/file/2021-8-31/20210831234453535641.pdfIn PDF document text
    • https://cdmsig2.com/ckfinder/userfiles/files/22395307688.pdfIn PDF document text
    • https://sunnyvale.com/wysiwygfiles/file/juvofotikuvezi.pdfIn PDF document text
    • http://kondicionery-krasnogorsk.ru/upload_picture/file/molenojif.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_off0000c43d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC43D 10932 bytes
SHA-256: 4d0f8e21bfae7a38ca6980ef8fc9ac15e0b7d4834e63541ad04b5324410cc0c8
font_01_sfnt_off0000dd2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD2F 16700 bytes
SHA-256: 245188f0516c3601dcb9739ce26f9cf242df8921f2c959a8b44e2aa25112b81d
font_02_sfnt_off000107be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107BE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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