Malicious PDF — malware analysis report

Static analysis result for SHA-256 65e7cd93edeb6d8b…

MALICIOUS

PDF

83.3 KB Created: 2021-04-04 21:03:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 89f27f26f8330aed0116fe6f0146ed67 SHA-1: 2f46203a1b274949525d770670440073c2f79484 SHA-256: 65e7cd93edeb6d8b0eebffb83abf9c830138a11ba0351e570e1a185646a7dc0b
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, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to host malicious content or redirect to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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 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://baarspo.ru/award?keyword=online+bhagavad+gita+in+english+pdf PDF link annotation
    • http://gufezonasu.iblogger.org/74970716060.pdfIn PDF document text
    • http://vzruvayarttraff.xyz/15238610496w7wgn.pdfIn PDF document text
    • http://bobixina.getenjoyment.net/tefijodekozizo.pdfIn PDF document text
    • http://jujavekerubeko.scienceontheweb.net/rezunikogapasep.pdfIn PDF document text
    • http://streamsweets.com/54268269977qzepw.pdfIn PDF document text
    • http://buputenajonix.mywebcommunity.org/acordes_de_guitarra_rock.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392667/normal_606401f5862a7.pdfIn PDF document text
    • http://tetiviguxawik.getenjoyment.net/comment_apprendre_l_anglais_facilement_et_rapidement_gratuitement.pdfIn PDF document text
    • http://beautysale.site/lowuxubceldu.pdfIn PDF document text
    • http://duwinijuj.mypressonline.com/72145567484.pdfIn PDF document text
    • http://trokot-newshop.online/wd_my_cloud_personal_nas_drive7cu92.pdfIn PDF document text
    • http://onlyforyou.space/54841700190r2lm3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418565/normal_605853850986e.pdfIn PDF document text
    • http://trickyturkey.com/83521263542pcmpt.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://gugamofizuxeg.epizy.com/sedidigewufuberolubawab.pdfIn PDF document text
    • http://lugivodunoxasi.atwebpages.com/maths_lessons_for_grade_1.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0D2 5436 bytes
SHA-256: 610efab79cfc6fb6cc7168014d742254d8fd521ede9544573651980c6b81ee79
font_01_sfnt_off0000f348.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF348 3740 bytes
SHA-256: 6ce3ed3d0cf168fbf74d6eb321148d5efc31cda11559831b77020f7d4c9f4c8c
font_02_sfnt_off0000fec3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEC3 11712 bytes
SHA-256: 2b0f0833615f5d371ee2cd10e555fae832c6b5528c320c819976aeb747d10de4
font_03_sfnt_off000124ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124AC 7144 bytes
SHA-256: 1ac48bd8e8f18f25c7a5150e15e1174a804b9135ff5952fbbfa20b3b27c49f24

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