Malicious PDF — malware analysis report

Static analysis result for SHA-256 569b445a4474d015…

MALICIOUS

PDF

88.5 KB Created: 2021-09-20 06:53:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: cff0992910d3f6eb4256432cb8b3171c SHA-1: 9c9b7d16bfe0c589e6841e3d9e67a9087379d99f SHA-256: 569b445a4474d015fb331e2ef4e9862210b6dfa5871628c4bbf16d60664c8f96
204 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and multiple links to external URLs, many of which point to compromised WordPress sites. These links likely serve as a lure to download additional malicious payloads, as indicated by the ClamAV detection and ML classifier flagging it as malicious. The presence of JavaScript suggests an attempt to execute code or redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9940

Heuristics 8

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://huntic.ru/uplcv?utm_term=android+data+recovery+fonelab PDF link annotation
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/abf25b5320bb17fbb435dd9498267489/54083355540.pdfIn PDF document text
    • https://prevodi-plovdiv.com/userfiles/file/94579793118.pdfIn PDF document text
    • https://bcbc3399.com/upload/files/gusuxo.pdfIn PDF document text
    • http://panziofabian.hu/fck_kepek/78786432963.pdfIn PDF document text
    • https://angel-juicer.com/FileData/ckfinder/files/20210907_7C46C02014B2126A.pdfIn PDF document text
    • http://studiomedicoveterinariobellucci.eu/userfiles/files/mopesedasibev.pdfIn PDF document text
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/f18075933d38b39b3ca719b8a0f357fc/sitakamuf.pdfIn PDF document text
    • http://tikatalog.sk/_files/file/80289142101.pdfIn PDF document text
    • http://sirindhorn.net/upload/File/jadafemobazukukajipibofus.pdfIn PDF document text
    • http://mtecommerce.it/public/news/file/51578119645.pdfIn PDF document text
    • https://radmangroup-ye.com/rgfiles/file/86797671135.pdfIn PDF document text
    • http://nationalcoopadvisors.com/userfiles/files/99153278815.pdfIn PDF document text
    • http://belv.ru/userfiles/file/kirez.pdfIn PDF document text
    • https://ms1oke.com/contents/files/82735105139.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130e6a533435---64002806729.pdfIn PDF document text
    • http://ty-universe.com/image/files/20210910_201145.pdfIn PDF document text
    • http://garage-fuji.jp/js/upload/files/54773786957.pdfIn PDF document text
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/17cf3f55e272789e2f44cb2a0a9878cc/47158090089.pdfIn PDF document text
    • https://drinkpoint.com/uploads/files/87201138672.pdfIn PDF document text
    • http://rjbmachinery.com/d/files/5931707970.pdfIn PDF document text
    • http://vakantie-noordlimburg.nl/ckfinder/userfiles/files/42406584493.pdfIn PDF document text
    • http://ecohort.com/userfiles/files/dawemiruvo.pdfIn PDF document text
    • http://iact2001.com/userData/board/file/77357041625.pdfIn PDF document text
    • https://imotrading.com/images/userfiles/togelagagefituses.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dcce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCCE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f4e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4E0 18596 bytes
SHA-256: 14680bc611798ca91c4a2df6eb476b1e660ac1d49050c61026742bee7b4280ee
font_02_sfnt_off000124af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124AF 16448 bytes
SHA-256: 0e4cde3d5bdd5452960de995a4807c8da4ec665155a9812e2f8e54e6c49b7878
font_03_sfnt_off00013b89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B89 10600 bytes
SHA-256: e45fbc656b56024d0562600f7997b07ec61e482103d636a91fde1d062e628155

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