Malicious PDF — malware analysis report

Static analysis result for SHA-256 71475b62094db084…

MALICIOUS

PDF

77.1 KB Created: 2021-03-19 13:37:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: eb729ee6720564dac191c641f27186ff SHA-1: 4c62339193fc7c304f87c0c83d72668594b1e288 SHA-256: 71475b62094db08407f640fb5d9cc25fb15af1e999841bcf068d3b84c0f53d4d
126 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to disposable domains or are structured in a way that suggests SEO manipulation for malicious purposes. The ML classifier strongly indicates maliciousness. The primary URL, 'https://soxebez.ru/wix?keyword=ap+biology+powerpoints+campbell+10th+edition', suggests a lure related to educational content, likely to trick users into clicking through to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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://soxebez.ru/wix?keyword=ap+biology+powerpoints+campbell+10th+edition PDF link annotation
    • http://wide-take.top/wejexikukusiragisu1fm43.pdfIn PDF document text
    • http://changely.club/59707752865jekty.pdfIn PDF document text
    • http://ccckkkkk.space/40225725469rcrkt.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449630/normal_5fc7e9636540a.pdfIn PDF document text
    • https://damasidegiked.weebly.com/uploads/1/3/1/4/131411688/bozeka.pdfIn PDF document text
    • http://winoraama.website/27715715983m97lc.pdfIn PDF document text
    • https://fokomawirofuteb.weebly.com/uploads/1/3/0/9/130969657/kusenusabolide.pdfIn PDF document text
    • http://myshoes.moscow/the_maze_runner_2014_movie_in_hindi_download_480pcxloq.pdfIn PDF document text
    • https://biziliwedurukax.weebly.com/uploads/1/3/4/8/134889104/xuwibebusejewop.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378608/normal_5ffa4df3651b1.pdfIn PDF document text
    • http://bettyloustintruckbbq.com/sutopabidefudogew2zt2.pdfIn PDF document text
    • https://kepiloxuxamife.weebly.com/uploads/1/3/0/7/130740378/fudapukezoxowu.pdfIn PDF document text
    • http://guitar.su/free_email_templates_html_codeonbtl.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366958/normal_6035ecb75c2fb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://29c5b005-6627-40e3-9da1-9f9d3dbc34dc.filesusr.com/ugd/7ad284_100f9697ab2f44afb8ae50b8237128b7.pdf?index=trueIn PDF document text
    • https://e4586023-485a-43f1-9451-2d404684c5b7.filesusr.com/ugd/95ff22_a46906d5ee704339b3200025df8f5b1e.pdf?index=trueIn PDF document text
    • https://012a8781-80b6-4d33-8f63-56d56ef93f15.filesusr.com/ugd/6d3794_8ea0701b5b5642ea8bebe2bc955ee430.pdf?index=trueIn PDF document text
    • https://f74ea38a-ab8d-49a0-8d31-9a1d7ce64423.filesusr.com/ugd/5ceade_c1b6670ef0524e6cbce7621b0a88f01f.pdf?index=trueIn PDF document text
    • https://a2214900-82f6-4ed5-a432-d5ffd14110fa.filesusr.com/ugd/306b6b_57dd670de02d4ed88b2f51a673a69d0b.pdf?index=trueIn PDF document text
    • https://be1d055c-b83b-422e-9e68-1bf13cef350c.filesusr.com/ugd/5b1e3c_3cf76c05694d40eba34930e18cb6821e.pdf?index=trueIn PDF document text
    • https://3caa4030-7dd6-4be4-8a8a-e1981c45b3cd.filesusr.com/ugd/704988_0a59578eba174298944a8fb2fa93e21a.pdf?index=trueIn 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_off0000ebce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBCE 6004 bytes
SHA-256: f7858163d41c6b54fd5e9a1b5496a71226b8f1ee22b41da984760c5590f033e1
font_01_sfnt_off0001002e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1002E 11444 bytes
SHA-256: 9d0f39cc3cf5103230350d823ed6aae3ca0d727cc56bbdd7154097ad3eb97fb5

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