Malicious PDF — malware analysis report

Static analysis result for SHA-256 e80fe467d91bf4bc…

MALICIOUS

PDF

147.4 KB Created: 2021-07-23 11:28:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 26ad12319da76b7eae9f71f6670dcc66 SHA-1: cd2b896454f63036e839c42ce30ad42cd9c3cbda SHA-256: e80fe467d91bf4bc67809b3184a6e239d802625e2b54ca7d6999226f95ab5527
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 ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites and disposable hosting, suggesting an attempt to lure users to malicious content. The heuristic 'SE_INVOICE_LURE' further suggests a phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9920

Heuristics 7

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bec9c3c369---vegufemo.pdf In PDF document text
    • http://crystalnymph.by/wp-content/plugins/super-forms/uploads/php/files/0178efdb43054dd12f35dbf8674874f6/selewa.pdfIn PDF document text
    • http://noahjohnsonsark.com/clients/e/ef/ef24418f2336b9480f3353ee42fa3f58/File/8248009764.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac4a0a44cc7---benenabuparosuwoxelotogi.pdfIn PDF document text
    • http://zawayakw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080846ed8c36---surikoletepudode.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d66e6f6159c---94190818601.pdfIn PDF document text
    • http://palyavalaszto.hu/teszt/upload/file/pubofo.pdfIn PDF document text
    • http://avondale61.com/clients/e/e2/e25739fb73bf6f2fbed92e75d980d6c5/File/71720304137.pdfIn PDF document text
    • http://timebank.ru/sites/default/files/photos/pagefile/jupixu.pdfIn PDF document text
    • https://fnb-concepts.com/images/uploads/files/16073788215.pdfIn PDF document text
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/1608c804e2d6a2---xoboxenesuvixonozo.pdfIn PDF document text
    • https://antae.be/app/webroot/uploads/file/40331486019.pdfIn PDF document text
    • https://oiweld.com/wp-content/plugins/super-forms/uploads/php/files/60fd2244c7b27141a8d2b9e5c784ffce/88341221497.pdfIn PDF document text
    • http://tara77.com/clients/46590/File/biponusabugulujomipo.pdfIn PDF document text
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a9323e11525---laxuwinixoxitutoforarovu.pdfIn PDF document text
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/fl25rh0js6ce8e1pn6jeslc2mr/fonabadilafo.pdfIn PDF document text
    • https://pensiuneavlasin.ro/wp-content/plugins/super-forms/uploads/php/files/em04gm7d96ishctehcsbp4cigj/tegez.pdfIn PDF document text
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609041ae642bb---falejemaxerosut.pdfIn PDF document text
    • https://tectrongim.com/uploads/files/71419544587.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a37dc8dee25---4804343266.pdfIn PDF document text
    • http://liebherr-tr.com/userfiles/file/67003857878.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c869979a7d---28819020358.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ad825687e8---tesako.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=is+your+gpa+on+your+high+school+diplomaPDF 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_off0001dfd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DFD5 10896 bytes
SHA-256: 3d2cbe4d02f1fd29916271ad658adf13e6f741d66f199aa0c6f66635437a2ced
font_01_sfnt_off0001f89a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F89A 17884 bytes
SHA-256: 8e914c81971b1bba526e74c3a8947d1960590ee0ffdda18f91acafee4d703be6
font_02_sfnt_off000227ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x227CE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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