Malicious PDF — malware analysis report

Static analysis result for SHA-256 8128d25c4eca7532…

MALICIOUS

PDF

97.7 KB Created: 2021-03-28 19:47:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 2ca73af49ce765e4658e2aa29727ed43 SHA-1: 26c71cbf7917f0623229e70af44cc03fea89e5e8 SHA-256: 8128d25c4eca7532608f20f38e6e7c5dcd0393fb265836024edd306a9c939938
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 link farm. One prominent URL, 'https://seumenha.ru/award?keyword=andhra+jyothi+epaper+telangana+pdf', suggests a phishing or SEO manipulation tactic. ClamAV detection as 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0' further supports a malicious classification. The document body, though heavily obfuscated, contains keywords related to search terms, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9887

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=andhra+jyothi+epaper+telangana+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4484364/normal_602774ac9b3cc.pdfIn PDF document text
    • http://nomokesus.sportsontheweb.net/waruzipu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370088/normal_6048a35caee12.pdfIn PDF document text
    • http://nomenowunesazoz.scienceontheweb.net/african_american_full_history_movies.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443823/normal_6016006838f36.pdfIn PDF document text
    • http://javifimawa.mygamesonline.org/52644969955.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457561/normal_5fe7d009e4a48.pdfIn PDF document text
    • http://bisituz.sportsontheweb.net/cambridge_ielts_6_reading_test_3.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
    • https://952d9f4b-853a-4e85-af28-23c4d489d487.filesusr.com/ugd/8db125_048e44dbf8f14303a0c86ad1c0b1053a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pewebopufupe/menudeko.pdfIn PDF document text
    • https://59bb578d-b312-442a-858b-1a1a54b18a6c.filesusr.com/ugd/c79b1c_1e5a85a3003e4d95ae0cd848705ecc5d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nazekisigiduz/toro_sprinkler_design_guide.pdfIn PDF document text
    • https://023e3b0e-89aa-4e00-bd19-175c11a0a9c0.filesusr.com/ugd/5f4883_7c28bef3022b4a92a880b69652e59e88.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vuterijoze/marvel_strike_force_ftp_farming_guide.pdfIn PDF document text
    • https://b5c4f4dd-ae1f-4f6a-908c-f463551224e4.filesusr.com/ugd/dafd60_b79472dfc1a441b4a241ec306eb8a8d1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dukexajuj/soxotis.pdfIn PDF document text
    • https://s3.amazonaws.com/tixeligufokup/pennywise_pumpkin_template_printable.pdfIn PDF document text
    • https://655b5f2c-2f45-4411-b579-7e5bd587bf3d.filesusr.com/ugd/2a272b_4a638fcf252649af9ac0d343b57e9230.pdf?index=trueIn PDF document text
    • http://naxepedawizozet.onlinewebshop.net/manajemen_sumber_daya_manusia_marwansyah.pdfIn PDF document text
    • https://1cf095b7-1d29-4152-b82c-7733cf7ba0c7.filesusr.com/ugd/c1de29_b0945ed752f049319ddf30b5c1a22926.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/womirofop/ma_english_literature_books_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/tufitijinexu/26297878518.pdfIn PDF document text
    • https://9cf5cc10-3c2e-4e30-ae6b-73ed7beed88a.filesusr.com/ugd/5c2b46_625fb47d3fed4b07b33a9b3c6faff911.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/purawuma/bb_racing_mod_apk_1.pdfIn PDF document text
    • https://3a0d5408-2ea1-4258-8d29-5d96341cad2c.filesusr.com/ugd/79cb75_232bbd93374f4229ac3f68c6cd8f6135.pdf?index=trueIn PDF document text
    • https://7ec9ed57-df89-401a-953b-45744c150cee.filesusr.com/ugd/6e3131_c2cfd0708889460fa9e690710b433241.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012301.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12301 5292 bytes
SHA-256: 160a574dbf2639d18a60b174db31a756252a81714eaec25b125d96456c91d2ee
font_01_sfnt_off0001350d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1350D 3240 bytes
SHA-256: ea50968213161cd7f140302b90e31b6c94fdb98cd42896722db70fe1003274d7
font_02_sfnt_off00014267.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14267 12100 bytes
SHA-256: d98517d14167670081fd1befec3f73edb460c500aa7794ede98597243e2754d9
font_03_sfnt_off00016b20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16B20 3212 bytes
SHA-256: 9c52a83e9a3337bc9a8bb3ce923568c74f23fcce628f14f0106d07e1b4db8776

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