Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e363e18bee7b0f9…

MALICIOUS

PDF

91.8 KB Created: 2021-08-12 20:59:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 70c78ca9f01f1655c7b4a0fe82098d48 SHA-1: 298da59bb9f2dc1dd66e6c0fb7112aa50ef59a9e SHA-256: 5e363e18bee7b0f9de7f8789e2d425623fb053aba68a527543c6e8392fa46e1a
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a link farm pointing to compromised WordPress sites, indicating an attempt to redirect users to malicious content. The presence of numerous external URIs and compromised CMS upload links strongly suggests a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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 https://www.lavishlook.se/wp-content/plugins/super-forms/uploads/php/files/c256e47608c75c6a31452961776ade69/nidizamo.pdf In PDF document text
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/c1cb631d09c44e9cfef986d85a3c8ef2/9879364907.pdfIn PDF document text
    • http://therealmccoyfamilyreunion.com/clients/f/f9/f9ea119420dddc0cc5ac7622830b9f68/File/51744273041.pdfIn PDF document text
    • http://oticonshop.com/ckfinder/userfiles/files/55475017931.pdfIn PDF document text
    • http://eltonltd.ru/sites/default/files/uploads/zibep.pdfIn PDF document text
    • http://dok-vo.ru/userfiles/file/60024786556.pdfIn PDF document text
    • https://vili-al.com/uploads/wysiwyg/files/puxafi.pdfIn PDF document text
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/055698fb3f7d378bb87e66b12c237891/4223199049.pdfIn PDF document text
    • https://kopari.hu/files/file/riremasomigobun.pdfIn PDF document text
    • http://xn--e42bt3l.net/upfile/files/70720930287.pdfIn PDF document text
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/s8qfthfhbf04o35e460smobc99/kezefuvudipovivuvuw.pdfIn PDF document text
    • https://o-dance.com/upload/files/susosesuzuxemal.pdfIn PDF document text
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/01393c2385471b5b626fb67433bd429a/29311546630.pdfIn PDF document text
    • http://schubert-hh.de/image/file/duzagusumofapipaguki.pdfIn PDF document text
    • https://psychologgia.pl/Upload/file/34610431333.pdfIn PDF document text
    • https://imagebeaute.fr/userfiles/file/42538601877.pdfIn PDF document text
    • http://gtlitalia.com/userfiles/files/jifitepuduxilinib.pdfIn PDF document text
    • http://occahomesearch.com/userfiles/files/11788418508.pdfIn PDF document text
    • http://sys-svinding.dk/userfiles/file/16218254971.pdfIn PDF document text
    • http://nhasachnguyenvancu.com/Images_upload/files/16157105326.pdfIn PDF document text
    • https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/63f4abcf49a15ea0e8e1c55157142d58/36600981742.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a83ce5e2137---desusu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=como+montar+cubo+magico+passo+a+passoPDF link annotation
    • http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/123730fa5dff41b3f98c44a10ea722d0/vetepejegadurubifivaxep.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_off0000fe66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE66 10812 bytes
SHA-256: 14cddfc51128fbc2ef0535a13bb948d5c341a95c5dd722d9cb92a6e7163eefeb
font_01_sfnt_off00011727.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11727 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012f39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F39 19808 bytes
SHA-256: b975ebd628d5dd4cb75a44bdb1231b942a12515e6f48b88d790011351818bf88

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