Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebe2276ce7f9b83f…

MALICIOUS

PDF

88.0 KB Created: 2021-03-23 05:59:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: bd920cf1257b33c23dddd5ef4d86e18c SHA-1: ec58914d03b4a9897d965efd27c6f6062563d14a SHA-256: ebe2276ce7f9b83f06660c68ee8db97486d8d694fc5f7fa939fb8d3d053e018f
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a technique often used for SEO poisoning or phishing. One prominent URL, 'https://zajinet.ru/aws?utm_term=memento+mori+unus+annus+merchandise', appears to be a lure. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://zajinet.ru/aws?utm_term=memento+mori+unus+annus+merchandise PDF link annotation
    • http://idealicait.website/46231856426bu5be.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380393/normal_5ff0af1ab5a97.pdfIn PDF document text
    • http://samozanyat.info/how_to_write_a_descriptive_essay_about_a_picture_exampleglrog.pdfIn PDF document text
    • http://table-wait.com/jusiwitezipitewoji6z52d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467298/normal_601b2cc6bc524.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376606/normal_5fdba906f264d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454056/normal_6058c45a0d9b8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/tubupejevomo/39800978347.pdfIn PDF document text
    • https://s3.amazonaws.com/pirosisob/bb_link_win_7.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c11e3542-bed9-486c-a29c-b197d5271ddd/naborememefabukakorudepox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58bcb2f5-208a-4a68-bb24-739ba639dce8/sazebukavebe.pdfIn PDF document text
    • https://s3.amazonaws.com/jozaponi/doxik.pdfIn PDF document text
    • https://d0275d90-c5b4-4c72-b581-d0e2b62fc6dd.filesusr.com/ugd/ee54da_6976301454184354b4fe355ab73e43f7.pdf?index=trueIn PDF document text
    • https://af1bea64-f5cd-41c2-a7c1-97f21c1aa057.filesusr.com/ugd/592671_de49e92c74d049cab3e27bb6f87fb089.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f87cd340-f33f-4ce3-96f2-94c90c1041d9/lizatukamivowupev.pdfIn PDF document text
    • https://s3.amazonaws.com/simujix/transition_words_in_writing_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/netinuwa/bibipobekuvavul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9bbe6ad1-85f5-42c0-af07-f13cea3ba1d1/beats_studio_1_wireless_headphones.pdfIn PDF document text
    • https://s3.amazonaws.com/wofaxil/aafp_pneumonia_vaccine_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/lekizopiloref/30452927119.pdfIn PDF document text
    • https://s3.amazonaws.com/sogovekevi/aadat_song_by_ninja_free.pdfIn PDF document text
    • https://s3.amazonaws.com/bufexa/nitona.pdfIn PDF document text
    • https://19aaccd0-9772-41b6-85c4-be118606641a.filesusr.com/ugd/a12125_7fc4e80720114d1bb2e8d31e6a7c3146.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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE2E 5036 bytes
SHA-256: a5358fcdedeca39aa3f0a501d4ba899945f5ab3c3a60c9b96794df8da78e1a96
font_01_sfnt_off0000ef0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF0A 7772 bytes
SHA-256: 6a61d66f95d806835fa2747dd7cc05ef1c7c884c5a3852e37a95452cc1c0417b
font_02_sfnt_off00010483.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10483 11596 bytes
SHA-256: 7a3805ca3f5122cb5cf1cf881123d897e3d9989f30e8f9a6c4ba61054b8d2c4a
font_03_sfnt_off00012c3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C3C 16168 bytes
SHA-256: e5458d7b6d82539349b17fc4713a17e1381d471255c72d9f8116b7c86e08c443
font_04_sfnt_off00014141.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14141 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176