Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec6815540fbe7a6d…

MALICIOUS

PDF

75.3 KB Created: 2021-03-20 00:32:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: be821bebdf541ba4a693bc4ebfd8c4e1 SHA-1: fa6736f92329d5171e8ccc1cb33bb4f2642c9a51 SHA-256: ec6815540fbe7a6d4525998550bb466bdb08cd30d4c19674742f4c1aafce830d
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged by ClamAV as Pdf.Phishing.Trojan. The ML classifier also strongly indicates maliciousness. The presence of external URIs and the link farm heuristic suggest an attempt to redirect users to malicious content, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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://pelibifir.ru/wix?keyword=minecraft+sp+exe+chomikuj PDF link annotation
    • http://vavesojijakoju.iblogger.org/best_reading_comprehension_books_for_4th_grade.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369911/normal_601e6f7b95662.pdfIn PDF document text
    • http://auth02mobility.com/voxopemozimipompvlh5.pdfIn PDF document text
    • http://helen-art.ru/do_ford_fiestas_have_transmission_problems9frxx.pdfIn PDF document text
    • http://leftoutclub.com/chicago_manual_of_style_tools_citation_guideaabi4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418791/normal_604469dbae2a3.pdfIn PDF document text
    • http://fragcups.com/72975645227naatc.pdfIn PDF document text
    • https://juduloto.weebly.com/uploads/1/3/5/3/135323899/e973b84ba7a3f75.pdfIn PDF document text
    • http://alcexpress3.xyz/gitegud00h.pdfIn PDF document text
    • http://health2health.online/babul_movie_in_hdueoj5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405467/normal_600c7353e8584.pdfIn PDF document text
    • http://runanuvu.iblogger.org/wopukez.pdfIn PDF document text
    • https://vigodabazo.weebly.com/uploads/1/3/4/8/134872933/bowifekelititur_kozuwiwe_zaxifofedozowe_wapegenadap.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459027/normal_60000d1f98a74.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c03439ef-6557-4199-865e-586791a52b6c.filesusr.com/ugd/6bb4a2_1ab13824e1a4419b8f7dfc79a1c9a0f6.pdf?index=trueIn PDF document text
    • https://b2d1eea7-aef5-47fc-962c-88b5513ecafc.filesusr.com/ugd/3a57bc_ea727c1db0ea40d29bd488135bffa9be.pdf?index=trueIn PDF document text
    • http://degepedafapuf.epizy.com/genesys_android_character_sheet.pdfIn PDF document text
    • https://46d16763-6c5f-4e19-aa2c-3f4071fcbec2.filesusr.com/ugd/26f730_c1afe36d473b4d828566a6a88fce26bf.pdf?index=trueIn PDF document text
    • https://569e8712-2873-4b93-a654-ea71b6b809e3.filesusr.com/ugd/345929_1eae5c54e64341b2a109501b1c8bed96.pdf?index=trueIn PDF document text
    • http://pusevim.epizy.com/tenidimazodigezakenemax.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_off0000eafb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAFB 5436 bytes
SHA-256: befc571fd6c9f9bd474d448332b41cdf4bb027ee5945194e1c3af538e504a27b
font_01_sfnt_off0000fd65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD65 10676 bytes
SHA-256: 6e4f89b180b15574396932277c7b9ffddb84992a4b93de7740d663b2464c4dad

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