Malicious PDF — malware analysis report

Static analysis result for SHA-256 89433440343582a4…

MALICIOUS

PDF

73.1 KB Created: 2021-06-16 16:58:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 5fbe7044c3db436c19c8954e5a6fd976 SHA-1: a842cc33b56f86dd07bdf1c44316dbc1f7020b1c SHA-256: 89433440343582a40c83e616ff79db6782c434ba584d3382ac00fd09b397e88a
156 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, many of which point to compromised WordPress sites and other disposable hosting. The document body, though heavily obfuscated, appears to be a lure related to song downloads, suggesting a phishing or content-luring attack. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://krisoc.ru/uplcv?utm_term=aapadbandhavudu+telugu+songs+download PDF link annotation
    • https://robotics-institute.com/wp-content/plugins/super-forms/uploads/php/files/l4enr2ssn6b9ak7btjdeegqga0/lifetozalodemidamugit.pdfIn PDF document text
    • http://nappsa.org/userfiles/file/28853212252.pdfIn PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608c8b60b4334---3185870023.pdfIn PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084a01a6b186---70029449813.pdfIn PDF document text
    • http://amy-tsai.com/images_express/userfiles/files/58257856209.pdfIn PDF document text
    • https://nnkcreations.com/userfiles/file/78094396084.pdfIn PDF document text
    • http://alphaconsultinggroup.us/vpw/images/file/59531424698.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9eb3c94781---13825837099.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/160865f9ae97c3---47919188411.pdfIn PDF document text
    • https://wecareprogram.org/images/file/zevurezavajepew.pdfIn PDF document text
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/4c5c4891144de2b019579cd5731a67d8/96669737548.pdfIn PDF document text
    • http://nature-revive.org/files/file/zitidikefakekotijapojuvax.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/16074b20ef28b6---peweparexomesiw.pdfIn PDF document text
    • https://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b1a2eef2ecb---26319987166.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dfc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFC5 5408 bytes
SHA-256: 02cbeb29c63deea17d63780a9aaa789b99b6ba54594eed22abe141720ab32104
font_01_sfnt_off0000f239.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF239 10936 bytes
SHA-256: 28c01a4581ece4ff7767e5e2c06f5b7023e83cf4622066c240fc572c46a5684d

Open this report in the interactive analyzer, or submit your own file for analysis.