Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0c418bb4adc39ae…

MALICIOUS

PDF

77.3 KB Created: 2021-03-23 19:31:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: e6e6549a13af37089d1ea5fad55da368 SHA-1: ac90f43ac87d1c5e3cf431da24e9ab3bbb17fb07 SHA-256: e0c418bb4adc39aec3a51fd2a4c7165dc2d331c04f1978543559e84ebc1c6c15
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing operation. The document body, though heavily obfuscated, contains text related to search queries and application metadata, consistent with a lure to external malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://nipisod.ru/strik?utm_term=stephenie+meyer+writing+another+twilight+book PDF link annotation
    • http://domainlimax.xyz/654083373616hxqy.pdfIn PDF document text
    • http://mifilud.iblogger.org/chevy_cruze_2018_owners_manual.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495681/normal_602571f9ac34f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459630/normal_6054d784c5fe6.pdfIn PDF document text
    • http://tetikesebes.22web.org/budget_2020_19_pakistan_in_urdu.pdfIn PDF document text
    • http://vvd.bar/bezalumoxexomavenidegieq65x.pdfIn PDF document text
    • https://sobopagugakevul.weebly.com/uploads/1/3/4/8/134881985/4106403.pdfIn PDF document text
    • https://jifilebipik.weebly.com/uploads/1/3/4/3/134375607/8c44942.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490265/normal_5fd09f7c7d162.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448713/normal_5fffa7383a102.pdfIn PDF document text
    • http://sefesipodaj.22web.org/cutting_edge_pre_intermediate_student_book.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374177/normal_6022b49ad5fcd.pdfIn PDF document text
    • https://bedexupef.weebly.com/uploads/1/3/0/7/130775630/nepurizibaku_mitezine.pdfIn PDF document text
    • http://meetsol.xyz/dds_discount_near_me_applicationobqu8.pdfIn PDF document text
    • http://taygerr.com/672846658350luax.pdfIn PDF document text
    • http://novonet.online/woxadafitexecnxa9.pdfIn PDF document text
    • https://fixumimudojuzu.weebly.com/uploads/1/3/4/6/134607797/84347.pdfIn PDF document text
    • http://najezeb.22web.org/jetivovoma.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/85c8cb5d-3695-42d1-8f9a-776f32b86ae7/what_are_common_french_phrases.pdfIn PDF document text
    • http://bafoseniza.rf.gd/jijozonorowoxafij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54eebaa2-46cf-40c0-aec9-c6a2d0150a24/38578735365.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89112895-4817-4231-9e92-ecdab9801fc2/what_does_flex_mean_on_my_cpap_machine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/356f769b-d733-4650-b7fc-8315f50bc0d5/73913075183.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c37dcda3-e758-41dd-a697-d256a3d0faff/34765149232.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_off0000f110.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF110 5556 bytes
SHA-256: fdf55f402c6d46726d352c62c9e180b4c045fddb2b2258b48c9054e4acf82ea4
font_01_sfnt_off000103e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103E0 10580 bytes
SHA-256: 2fed7cc550a291ef8484176ad8ea8b38d1d3d85691a630e3d1933fc6acc93e8f

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