Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f228d1ea51d25ea…

MALICIOUS

PDF

87.6 KB Created: 2021-06-19 03:19:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 57089fc5ede5f943033e49c129593382 SHA-1: c76ca83925b12cd488c74d128ec7b7c7919a870a SHA-256: 6f228d1ea51d25eae4aa0dacd003d65591670f71a567e6baffc241b4bc465642
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 numerous links pointing to compromised WordPress sites, suggesting a phishing or malware distribution campaign. While no scripts were explicitly extracted, the PDF structure and embedded links indicate an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • 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://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160baa0d32ffd3---48682641133.pdf In PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/56be9313fc9b37a01471e12186b6aed4/51935334434.pdfIn PDF document text
    • http://alt-1c.ru/userfiles/file/15925423844.pdfIn PDF document text
    • https://www.mixedclass.com.au/wp-content/plugins/super-forms/uploads/php/files/0g6qn3a3o553vsog8cnml9s8db/lubaterikiv.pdfIn PDF document text
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/a86r97uha3s2c0ro93u8032nv8/31680972291.pdfIn PDF document text
    • https://brod-plovdiv.com/images/wabosupodufugesubeni.pdfIn PDF document text
    • https://www.citysecurity.org.uk/wp-content/plugins/super-forms/uploads/php/files/fmameb45q68ri6tr9e5p91035c/72349317503.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a6771f34317---15558769124.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082e068f2b72---74142902336.pdfIn PDF document text
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/5f98967c85c90f339daaad57ed29b0a2/17162105556.pdfIn PDF document text
    • http://www.kilincsweb.hu/fileok/file/pajomafitubazizo.pdfIn PDF document text
    • http://www.bandungmesin.com/file/nofezebeganun.pdfIn PDF document text
    • http://suachuaspa.com/upload/images-content/files/bibarulomixefodifule.pdfIn PDF document text
    • http://www.anjhimayath.com/upload/file/53558812358.pdfIn PDF document text
    • https://omomediacion.com/wp-content/plugins/super-forms/uploads/php/files/6739d8edb2627c45d6db8d66bdfdba01/65835122196.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=al+qunoot+pdfPDF 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
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0001288d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1288D 23692 bytes
SHA-256: dcb9e6c8f02446f1eb8ed4464fbeda5d7f4fa2e9fb8c4df57202ce0cba599e36
font_00_sfnt_off0000f13f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF13F 4664 bytes
SHA-256: 0d83acbeedfe1893e78291663e10547c78c12fd44c0517933ca5ecad8675fe74
font_01_sfnt_off00010138.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10138 12228 bytes
SHA-256: b01e1654ebb046f9d34689686815341fd514067f3ec40ed357971a5519a9823e