Malicious PDF — malware analysis report

Static analysis result for SHA-256 093cec97dbfab357…

MALICIOUS

PDF

76.8 KB Created: 2021-03-30 05:23:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 5bfa9bf4be595ea71775f90af94f7e28 SHA-1: 009661bbd0eba0af841e2745b967db231db444b3 SHA-256: 093cec97dbfab357449fd6be268a3eda796a84155c6342251c1d6fc5ab0d1da9
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many hosted on disposable domains, suggesting a link farm designed to manipulate search engine results. The primary URL, 'https://mezovuduw.ru/wix?keyword=core+connections+course+1+answer+key+chapter+9', is presented as a search result for a course answer key, a common lure for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or serving a malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://mezovuduw.ru/wix?keyword=core+connections+course+1+answer+key+chapter+9 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4469841/normal_6038808a416b7.pdfIn PDF document text
    • https://cdn.sqhk.co/vujagefamig/WghghLb/football_players_of_liverpool.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369651/normal_600cf1cf9ea86.pdfIn PDF document text
    • https://cdn.sqhk.co/jadepibake/bidhj12/46105226342.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405903/normal_603401ccede1c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489054/normal_5fe98e94b0899.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422168/normal_605ef1edbfef8.pdfIn PDF document text
    • http://migasoloraluxuj.scienceontheweb.net/grammar_exercises_pre_intermediate.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369651/normal_5ffbc503bf457.pdfIn PDF document text
    • http://nesorus.mywebcommunity.org/dogotuzudanamegu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416153/normal_602b4e6277e95.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416664/normal_60168cee0d8c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495973/normal_601d069b5430e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://7ef5d8b8-74ac-4e0a-b0a0-fa61ca6462a8.filesusr.com/ugd/23e9be_d4d8d6b54828478e9be3c2fe66aba613.pdf?index=trueIn PDF document text
    • http://kesupipipiret.onlinewebshop.net/zefixifufirikikivuweb.pdfIn PDF document text
    • https://bff5fdab-9fd0-4670-908b-a1308bb5a9cb.filesusr.com/ugd/227d0f_43a4abbd59e946eb853a34c7b4f495f3.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf5a6445-824b-4b40-b996-1b0813f54155/sobadimer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ab8dd76-b130-4da7-a0ed-452840912ad2/26829743699.pdfIn PDF document text
    • https://a1f0096d-76f5-425c-b826-5ccbd312c1bc.filesusr.com/ugd/8f8c07_63b4a82df01f457db34c2f123c51b00c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a0f0ad6-aaca-4be5-b9fc-6a0b1f084b33/jukikujebudefoxujijel.pdfIn PDF document text
    • https://52a1af19-6946-4c37-aba6-ab00a30e4874.filesusr.com/ugd/5dc3ca_8df8f8b29f0147f794c283878928948c.pdf?index=trueIn PDF document text
    • https://cc46d2ba-e7cf-42f8-aa62-b015a0c17ef0.filesusr.com/ugd/d180c3_569039d2c71a4f5c9f6a8c2072690199.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e21b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE21B 5360 bytes
SHA-256: 1d20d51b696f58e63594e9c3c0a61884bc32a0a29f4216252d8b81e355cd8e0b
font_01_sfnt_off0000f46d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF46D 10276 bytes
SHA-256: 373e916b79e6d967a5fe3009f059c473fdf997a5463ac72bd23dcf32bd8a089b
font_02_sfnt_off0001176a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1176A 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

Open this report in the interactive analyzer, or submit your own file for analysis.