Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b227b014710f06a…

MALICIOUS

PDF

116.0 KB Created: 2021-03-16 16:02:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 67e5e0386de036ebccc989817a14a14f SHA-1: 650be5baeef53c2c1c34384e4ea31eae22d52310 SHA-256: 6b227b014710f06a7a176c1b35e1de4649beef928a7f88cf4360eaa1f5df5620
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying it as a PDF SEO link farm. The primary external URI points to a suspicious domain, 'seumenha.ru', which is likely part of a scheme to manipulate search engine results or redirect users to malicious content. ClamAV also detected the file as 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0', indicating a phishing or trojanized document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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 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.
  • 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://seumenha.ru/award?keyword=pisciculture+carpe+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4412575/normal_5ff4feee05c2c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461250/normal_5fe7fc0bcbc46.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475997/normal_6002412373bf9.pdfIn PDF document text
    • https://cdn.sqhk.co/zibomevuguli/hkYzi2A/bouncy_ball_chairs_in_classrooms.pdfIn PDF document text
    • http://fewobamuge.iblogger.org/newawuwetizak.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480155/normal_600308e665c26.pdfIn PDF document text
    • https://cdn.sqhk.co/xenotami/VHAX6GL/liverpool_fc_live_wallpaper_for_android.pdfIn PDF document text
    • http://tuvimokasodo.22web.org/algebra_2_common_core_regents_review.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369769/normal_5fce6f7661a20.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pexalezevedizaj.epizy.com/honeywell_hcm_350_humidifier_home_depot.pdfIn PDF document text
    • https://s3.amazonaws.com/rikolesafuwofar/gerudamunepatufusulisu.pdfIn PDF document text
    • https://s3.amazonaws.com/taguxif/adguard_premium_apk_3._2._121.pdfIn PDF document text
    • https://s3.amazonaws.com/jasipefulaxiduj/julius_caesar_act_3_summary_sparknotes.pdfIn PDF document text
    • https://8d94caac-80d5-4f6d-a73a-04ed47837dc1.filesusr.com/ugd/585b1d_0cdd0ea56a0546779f55240367a6e25d.pdf?index=trueIn PDF document text
    • http://bopufadepop.epizy.com/22029853755.pdfIn PDF document text
    • http://xosofidevutora.epizy.com/dofikoloferuxa.pdfIn PDF document text
    • http://zufagubiles.epizy.com/66350358301.pdfIn PDF document text
    • https://8fc1c2d6-49ba-4d63-8b95-0327ef2b1627.filesusr.com/ugd/1849a1_7470f2e7a86e46c5acc45d9ce8274748.pdf?index=trueIn PDF document text
    • https://48936d5e-4b15-4059-a328-ddb12afcc15e.filesusr.com/ugd/173145_16e60b7bce124dfda330c2ddbb4d8a35.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gagotaniwipure/bill_of_lading_act_1855.pdfIn PDF document text
    • http://nemebikox.epizy.com/diwokalaxo.pdfIn PDF document text
    • https://s3.amazonaws.com/woxorojero/tixanowupibirudasulig.pdfIn PDF document text
    • https://dd7ee03d-3646-4e01-a1e1-4c0a7e2c9e57.filesusr.com/ugd/d7ba0f_e591b5726a094a64a72156c7980bacc4.pdf?index=trueIn PDF document text
    • http://dudijujixafag.rf.gd/83690252546.pdfIn PDF document text
    • http://sagulisopopu.epizy.com/78955922349.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_off00018601.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18601 5152 bytes
SHA-256: 126624ee545bd706eef1593485b2c02d1ae715c36da6c4aaa38d0fb4ca069889
font_01_sfnt_off00019798.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19798 13660 bytes
SHA-256: 52092bfff0df397285a7af80a7f44e42ff96b32a5aab189f0f46f580cd1e8994

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