Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d26de0aa26fde9f…

MALICIOUS

PDF

113.4 KB Created: 2021-05-27 15:44:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 279885f62c01431ae541d95c18692871 SHA-1: 3eab7575ed33c928da88fc2b6accba8a0443c439 SHA-256: 4d26de0aa26fde9ffa3c51ac35bc1e64709ca31ddb0adca57f881e7ac4cad35a
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, characteristic of a link farm designed to improve search engine rankings for specific keywords. The primary URL, 'https://seumenha.ru/strik?utm_term=chanakya+neeti+pdf+marathi+download', suggests a lure for users searching for specific content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution via these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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/strik?utm_term=chanakya+neeti+pdf+marathi+download PDF link annotation
    • https://jikevumuvovidu.weebly.com/uploads/1/3/4/3/134324483/bemejutebitapol.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476285/normal_6056a4c60f310.pdfIn PDF document text
    • https://figajusare.weebly.com/uploads/1/3/4/6/134610400/6554694.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407301/normal_5fcbf4b0d5bfc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380083/normal_6052ac4a785a2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426262/normal_5ff16fc0dd456.pdfIn PDF document text
    • https://nidozasa.weebly.com/uploads/1/3/4/6/134680612/jakoguvimasi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497109/normal_60691e55d1ae6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378155/normal_5fcd02e7db01e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425227/normal_5ffa6163f1e08.pdfIn PDF document text
    • http://fedorahosted.org/lohitIn 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/cf1164ca-c0d5-442a-a187-163c036a59b0/manual_galaxy_dx_959_en_espaol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7fa9ee4-bd53-48de-892a-1ad365fd0646/juratikobiboxukuka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73f9055a-aba0-4957-ab37-195615e23fcb/39130047488.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6cc43576-d36e-4e32-a3bf-9542d77c5eed/how_to_reset_jbl_go_2_bluetooth_speaker.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ef36c1d-9baf-4688-b9ab-81bdfa4f569a/80050557611.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e055d696-e2cc-4d8d-9b4e-5314a251b403/will_you_be_my_godparents_card_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eda2e471-b704-453f-92b1-9d9efa50ee47/anta_yaynlar_7.snf_trke_soru_bankas_indir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa4560f5-3cd5-49a9-8e1c-4ae42066d859/printable_actual_size_cd_cover_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c89a71b-d72e-4d03-b43e-9f80871bb288/el_aleph_jorge_luis_borges.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/152f8718-b99a-4b87-bbc0-47db2e721a80/what_is_neural_network_in_computer_science.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6d614ee-f2b4-4b28-8e60-1eb07062d770/ray_bradbury_the_pedestrian.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d412014-0825-4196-8985-e863844a63bf/marathi_one_act_play_script.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87cbef37-c577-4a5d-8f05-d2c19d8dd571/puninego.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00017eaa.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x17EAA 20824 bytes
SHA-256: 3c5b650bd623a152324c332193555bc9f296f323634ea044ced27d578b3daffa
font_00_sfnt_off00012e2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E2A 5268 bytes
SHA-256: b942e4645ad9a7380ff3e3459b65ec6c37dcddca305e317aa558056ed926965c
font_01_sfnt_off00013fff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FFF 12844 bytes
SHA-256: 72f776f8e6a5d5a5812b163c7c3cb2e95c14614e85bb07598b38c9f9541ea56c
font_02_sfnt_off0001693f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1693F 16204 bytes
SHA-256: e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15

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