Malicious PDF — malware analysis report

Static analysis result for SHA-256 c72a0474681b0919…

MALICIOUS

PDF

66.4 KB Created: 2021-03-14 14:43:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 1cdf47ecfc1f0ffdf9fb333d872f901b SHA-1: 406356003868320d5d662824e795afe7f1c90e44 SHA-256: c72a0474681b09193ff0fdcce126758f704a9baa35e0f6eb06e3acc6289d869f
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. One of the embedded URLs, 'https://leonvi.ru/wix?keyword=alabama+elite+baseball+10u', is likely used to direct users to potentially malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://leonvi.ru/wix?keyword=alabama+elite+baseball+10u PDF link annotation
    • http://miwewumexurigan.sportsontheweb.net/77993944661.pdfIn PDF document text
    • http://wamuwosola.mygamesonline.org/vavotokubij.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://bf68d742-fb98-404a-ab47-1dcf24f7df52.filesusr.com/ugd/83e7fd_024d420212d6415b914d0a0e1941af48.pdf?index=trueIn PDF document text
    • http://dowafirowelumex.atwebpages.com/75664668076.pdfIn PDF document text
    • https://s3.amazonaws.com/vuliwisuwig/72552562498.pdfIn PDF document text
    • https://cc652f91-b1ab-470c-b36f-46d838ef85b2.filesusr.com/ugd/fbccce_11471dfccb694b5198c72f4eb94982f9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jeduzizonox/best_free_mailchimp_templates.pdfIn PDF document text
    • https://7a3463bf-3117-47cc-940f-ad9d50d05675.filesusr.com/ugd/9f2514_b4f4868fc74a4fb98946325a5de6c48e.pdf?index=trueIn PDF document text
    • https://de2a8dfc-dc8d-4d62-be3b-f97abdd17bf6.filesusr.com/ugd/c722c2_0a8c17a08e5346ada0bbab7f4ea0432e.pdf?index=trueIn PDF document text
    • https://0f8fedcd-12c0-4678-86f8-e2bff7269121.filesusr.com/ugd/70e7d4_c2f9a75c790c4bc597bc272f57344f06.pdf?index=trueIn PDF document text
    • https://8546b567-499d-44cb-812b-f4cb210fa0cc.filesusr.com/ugd/1f0b74_cda3628df9b443019413042c573e8ac6.pdf?index=trueIn PDF document text
    • https://5b949be5-44ef-49af-96c7-0ebaa8fe632e.filesusr.com/ugd/3402b1_707865e2c02c4a6bb17a17cb37197e82.pdf?index=trueIn PDF document text
    • https://05e27880-d5e1-4d3d-8428-ba943e9300bc.filesusr.com/ugd/b56239_9e30ecbe7575467eadd7cfa68b3c1f56.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c73e5cb6-01d4-4f21-8ea7-7e86323e10d7/molecular_biology_genes_to_proteins_free_download.pdfIn PDF document text
    • https://627f215e-41ba-4aa4-9906-5f9f9d117739.filesusr.com/ugd/8ab72e_4465fa3672574f0d80e18ee13bea0743.pdf?index=trueIn PDF document text
    • https://e082cb0d-9c22-4a21-acb7-e2c6127a51d3.filesusr.com/ugd/ff0c06_fa3a8361ce944abe8e8983d9e56e099d.pdf?index=trueIn PDF document text
    • http://manosotidokef.myartsonline.com/how_to_buy_classical_guitar_strings.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cbc0bd4d-e996-475d-817f-2e1cb4d7faa6/where_is_the_filter_on_a_maytag_quiet_series_300_dishwasher.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c862.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC862 5056 bytes
SHA-256: e9a915e3dd4c5624929a0df987754bf64492a920aeae8ffb6a1ed912891cfcf7
font_01_sfnt_off0000d983.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD983 10384 bytes
SHA-256: d7e453ea756fa6cd477f0027797f6305a633d98397c9489e6914c6393edf6992