Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e38badc9c2cb03d…

MALICIOUS

PDF

92.2 KB Created: 2021-09-12 16:24:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: ee84263329f147f28eed3ac56df222c0 SHA-1: 6f150c35fbc56ce6d334060fa1544b7fe6b3c7c5 SHA-256: 7e38badc9c2cb03d6c5171dce50154f77e1c1af3b0ecde20594b190a3cdc1cee
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains embedded JavaScript and a link farm pointing to multiple distinct hosts, many of which appear to be compromised or disposable. The embedded JavaScript likely serves to redirect the user or download further malicious content, contributing to the overall phishing or malware distribution goal.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/62e63ad3a589d4a3dea1f4f2db19c029/39429060231.pdf In PDF document text
    • http://recepti.plovdivweek.com/js/ckfinder/userfiles/files/kodekomavukosogaxefu.pdfIn PDF document text
    • https://www.myjamaicais.com/wp-content/plugins/super-forms/uploads/php/files/db75f53cc4d6547c1186609ada38f3f9/nunejokaxajewetizipugi.pdfIn PDF document text
    • http://amandamaitland.com/images/file/51348108340.pdfIn PDF document text
    • https://12shio4.com/contents/files/56184119519.pdfIn PDF document text
    • https://chilegastronomia.cl/uploads/userfiles/files/38241741404.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613bc6aec2090---85777191904.pdfIn PDF document text
    • https://anfauglir.com/images/file/97276253094.pdfIn PDF document text
    • http://turystyka.powiatlubartowski.pl/admin/ckfinder/userfiles/files/9841782658.pdfIn PDF document text
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613d5c24aafda---71149191770.pdfIn PDF document text
    • http://musicandyouapp.com/webupload/editorimg/files/86031910197.pdfIn PDF document text
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/7c086ba228f8af5c7e646809852cd5af/nikotazinupo.pdfIn PDF document text
    • https://istanajp.com/contents/files/38430653656.pdfIn PDF document text
    • http://chenruichem.com/upload/files/ziforugefi.pdfIn PDF document text
    • http://hanasushichoice.com/uploads/files/wuguxobev.pdfIn PDF document text
    • http://salon-urody-bellis.pl/images/file/52120430394.pdfIn PDF document text
    • http://scbczy.cn/up_files/file/20210908_112359.pdfIn PDF document text
    • http://bjjiffy.com/upload/gomidebodasuvaku.pdfIn PDF document text
    • https://www.assofmt.org/ckfinder/userfiles/files/2682331823.pdfIn PDF document text
    • http://m-camper.ru/ckfinder/userfiles/files/33837215794.pdfIn PDF document text
    • https://aglogistics-bo.net/userfiles/file/77765827256.pdfIn PDF document text
    • http://opersan.com/file/zifodoxi.pdfIn PDF document text
    • https://wedding-photos.cz/userfiles/file/58385642419.pdfIn PDF document text
    • http://anhuifan.com/upload_fck/file/2021-9-11/20210911100425338019.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=bollywood+new+full+movie+onlinePDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010695.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10695 17264 bytes
SHA-256: bb5d9b3d3fb25da872a68038d0e1cbe0c220b7a366651077a6e2301e0180b2ac
font_01_sfnt_off00013366.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13366 10404 bytes
SHA-256: f69ae5c3f0a37e2a2930e5617cbe4a0b2047048fbcd63d76daa9dfaa4ad8cddf
font_02_sfnt_off00014af9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14AF9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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