Malicious PDF — malware analysis report

Static analysis result for SHA-256 2497fad7c6c3be12…

MALICIOUS

PDF

69.3 KB Created: 2021-02-24 19:14:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 6b492451e70e8e4fa453f19f751db4e1 SHA-1: d0729c87093fa00c6278bc173564eb4c525521f5 SHA-256: 2497fad7c6c3be121aaaf99c9035d766efa5ec6a3a589734b23fb006c9089341
182 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs pointing to potentially malicious or disposable domains, indicating a phishing or redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics point towards a phishing attack, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7687

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/award?keyword=wellness+wheel+activity+online In PDF document text
    • http://worelimupuvefam.mywebcommunity.org/what_is_the_best_automatic_espresso_machine_for_home_use.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380536/normal_602c029f67ced.pdfIn PDF document text
    • http://nemosixumeki.mypressonline.com/78630401815.pdfIn PDF document text
    • https://cdn.sqhk.co/vewimidipiv/kiajchi/stick_run_hack.pdfIn PDF document text
    • http://vvinorama.fun/falcon_bms_4.33ly05i.pdfIn PDF document text
    • http://buloshnaya.site/sawagekasaloxujkxk2r.pdfIn PDF document text
    • http://famozosivupiwij.sportsontheweb.net/our_man_in_havana_audiobook_youtube.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bireses.rf.gd/64415745498.pdfIn PDF document text
    • http://luvufipujadazik.rf.gd/46706497100.pdfIn PDF document text
    • http://gofosuxubajo.epizy.com/jelufegigujoso.pdfIn PDF document text
    • http://povuputuk.epizy.com/senior_graphic_designer_salary_new_york.pdfIn PDF document text
    • http://vanudedu.epizy.com/wepuvabujarelumexofut.pdfIn PDF document text
    • http://fedubumisuvek.epizy.com/15107072212.pdfIn 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_off0000e569.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE569 4848 bytes
SHA-256: 620d5be56534d51c9ebaeae408914bbe7c34b43da8e8e9b328543af16595adb8
font_01_sfnt_off0000f5ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5EF 10488 bytes
SHA-256: e4db0e0365093d94ae4e4e64d77c4e08f7fd84ef2f7ff02a8af054c7e3c88548

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