Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbc64d2ba1e35296…

MALICIOUS

PDF

66.8 KB Created: 2021-05-29 04:38:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: b29d9dcd957f8aefbb91e9085f51c0c9 SHA-1: 495005fdcc1f78a9cc9f753e12d20549fd9318fb SHA-256: cbc64d2ba1e352966bb68f221cf32f6939355cf356704efa173ed6d40019c15b
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://nomylo.ru/uplcv?utm_term=reckless+love+chords+bethel PDF link annotation
    • https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/2be46d412659531aba58a661738e2bdf/73206859977.pdfIn PDF document text
    • http://crystalnymph.by/wp-content/plugins/super-forms/uploads/php/files/1a85c53a8283c0214bfd9b1908d95efa/jigof.pdfIn PDF document text
    • http://diversecityuk.com/userfiles/file/fuduri.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/2576910bf3626d272dc4817b63335deb/vurulevapivepimesomidaju.pdfIn PDF document text
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/c6efa230aa355320b2185306a0a35e4d/derinim.pdfIn PDF document text
    • https://hartwellcook.com/wp-content/plugins/super-forms/uploads/php/files/71dfb765fbbe7989a01465c77fe79fa5/18549790357.pdfIn PDF document text
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160931475cb5bd---92663326679.pdfIn PDF document text
    • http://app8itebarandgrill.com/admin/images/file/pawatub.pdfIn PDF document text
    • http://jrmhandling.nl/upload/file/vorakipewexaxusaserotu.pdfIn PDF document text
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160a6d2a1392b4---49947793853.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/0a7dd8tsf1ahiqgkem9mt5l6oi/fejixijoruju.pdfIn PDF document text
    • https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/4f1eda80ed779b7bb29b77e904894ef3/woreliragosutamotimif.pdfIn PDF document text
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/7e3278a685a80c757a63e6f02dd9063c/fuzalatutiru.pdfIn PDF document text
    • https://humble-brag.com/wp-content/plugins/super-forms/uploads/php/files/9qlbr198sh9hs0rmr7qnvkv62f/nudigafadi.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_off0000c722.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC722 5088 bytes
SHA-256: 7931d4ef9aa562bf9fc1dfffe23f9a0b6af149116724c20eafeecae045a13784
font_01_sfnt_off0000d875.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD875 10676 bytes
SHA-256: 29d27089d6bc61aa5c4c1efc93c1170966c20ebaad091566ffce579b3a9a5148

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