Malicious PDF — malware analysis report

Static analysis result for SHA-256 bed72c4a2676679f…

MALICIOUS

PDF

82.8 KB Created: 2021-08-28 13:28:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 863bd386bd95323d07f77bdae236d4df SHA-1: 633945d501418fe926d973963703d994e896dd1f SHA-256: bed72c4a2676679fea08ff3120db8d6ce0eef48506d46552f1d0c378dcd85e67
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and ML classifiers, indicating a high likelihood of malicious intent. It contains embedded JavaScript and a link farm pointing to compromised WordPress upload storage, suggesting it's designed to redirect users to malicious sites. The presence of embedded JavaScript indicates an attempt to execute code, likely to download further payloads or facilitate phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9925

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://irlanc.ru/uplcv?utm_term=notion+meal+planner PDF link annotation
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/160709900d81e0---11695625664.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16105f7ef7ecff---37116145076.pdfIn PDF document text
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5cf4988f64---47984954128.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160983922db56c---sopopilu.pdfIn PDF document text
    • http://www.ecvbrass.ch/user/web/file/81786095560.pdfIn PDF document text
    • http://turagent007.ru/userfiles/file/panabote.pdfIn PDF document text
    • https://palezieux.com/ckfinder/userfiles/files/55117752921.pdfIn PDF document text
    • http://gimhaejazz.com/fckeditor/userfiles/image/71985638568.pdfIn PDF document text
    • https://harkakotony.hu/UserFiles/file/degos.pdfIn PDF document text
    • http://candientuvibra.com/images/file/tevox.pdfIn PDF document text
    • https://octvads.site/js/ckfinder/userfiles/files/gedumugutuxigoririfuxapo.pdfIn PDF document text
    • http://thesnowmanicecream.com/ckfinder/userfiles/files/54774050099.pdfIn PDF document text
    • http://robalton.es/Albums/images/file///sitefar.pdfIn PDF document text
    • http://greenplanetnepal.com/userfiles/file/75402552452.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a92ba0a0adc---jazelinak.pdfIn PDF document text
    • https://infrapanel-alegjobbfutes.hu/userfiles/file/ferorexanuxakezul.pdfIn PDF document text
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160be38f2ae31b---47075033914.pdfIn PDF document text
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/fa4f7ab9ce6c8359d2584aebaf2eb7cb/nogafitamisosa.pdfIn PDF document text
    • http://ktcyy.com/ckfinder/userfiles/files/22262497310.pdfIn PDF document text
    • http://namngonviet.vn/user-/files/tenuwixopitasilinuje.pdfIn PDF document text
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/vm9r6vrp2gjk6ptej9se8j5imu/wajatowalagaboradujovure.pdfIn PDF document text
    • http://mashtalkandil.com/userfiles/file/redasirojalelokajegerijap.pdfIn PDF document text
    • https://machinex-machines.com/UserFiles/File/bubezunasewi.pdfIn PDF document text
    • https://bienenaktuell.com/sites/bienenaktuell.com/files/file/35889882430.pdfIn PDF document text
    • http://midel.me/userfiles/file/90089171116.pdfIn PDF document text
    • http://sarljarry.fr/userfiles/file/42957509383.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_off0000d862.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD862 21300 bytes
SHA-256: 95caff21325853dc7876ac24cd5443fda149f3376ebc9560e6d2ff016a3fb8ba
font_01_sfnt_off00010ddb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DDB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000125f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125F2 10220 bytes
SHA-256: cfb290240ca7d60b1c1d568cc1624ea4b42f4c94555d17946e9ba7796a678fee

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