Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c9ebabedc8b0dfb…

MALICIOUS

PDF

82.3 KB Created: 2021-05-19 10:25:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 5650f5bff6669953e29da4655c7a2df0 SHA-1: 592f66df02416cde31f7a09382dde188653dfae9 SHA-256: 6c9ebabedc8b0dfbb745056cadadc96085ccca4733051962deaedeba4999f1fc
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that redirects to a suspicious domain, likely intended to host a malicious payload or phishing page. The document body, though heavily obfuscated, appears to contain keywords related to 'Ring video doorbell pro installation australia', suggesting a lure to trick users into clicking the malicious link.

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 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://zajinet.ru/strik?utm_term=ring+video+doorbell+pro+installation+australia PDF link annotation
    • https://jabikazisejifo.weebly.com/uploads/1/3/1/6/131606509/tajusisapi-kawetederira-fobuwuw-duvatoxojoxili.pdfIn PDF document text
    • http://nokigafapo.22web.org/how_to_write_a_reflection_about_an_article.pdfIn PDF document text
    • https://posodukur.weebly.com/uploads/1/3/4/3/134347560/3141f27946d89f2.pdfIn PDF document text
    • https://vebexedupatad.weebly.com/uploads/1/3/2/7/132740253/7610e.pdfIn PDF document text
    • https://xipuzitob.weebly.com/uploads/1/3/4/5/134523495/626b8c78b4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415073/normal_602706c84becb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416786/normal_603cc67aca8f8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403819/normal_5fdc17eb3bc46.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452599/normal_5ff1157eb3c3b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/53dbbfb3-af64-48d0-a696-5d7fb21a4aa5/nigexinelupinuzix.pdfIn PDF document text
    • http://kanisisasulaba.rf.gd/wemobitojarivunotad.pdfIn PDF document text
    • http://kovefevejafuk.epizy.com/59401667907.pdfIn PDF document text
    • https://s3.amazonaws.com/rewepalazamiso/memories_of_7th_grade_math_word_search_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05ca9f2f-9070-4afd-a326-034dcce7e8a7/marathi_poems_free_download.pdfIn PDF document text
    • http://sejixopur.rf.gd/equivalence_class_example.pdfIn PDF document text
    • https://s3.amazonaws.com/kagedatabujo/will_there_be_another_scary_stories_to_tell_in_the_dark.pdfIn PDF document text
    • https://s3.amazonaws.com/sedowedi/tamim.pdfIn PDF document text
    • https://s3.amazonaws.com/pesetufavo/song_video_mp4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0ddd7f6-7c35-4156-baeb-49526848a8a7/append_text_to_log_file_c.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7ee6f8a-2885-4821-a971-69f146e517de/87353919263.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bcebd250-f61d-4b94-82b3-c8eff713c6b3/37990084013.pdfIn PDF document text
    • https://s3.amazonaws.com/punurum/xijivezoxiwuxebezowu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47c5b980-1573-4ea9-a0e2-998ec8f99be3/81210745623.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f6f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6F4 5216 bytes
SHA-256: 6af5ce2c84e7c724c8d353b3eff154dfa1142831cf397d559c60ce4c9a1b0fe2
font_01_sfnt_off000108be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108BE 10780 bytes
SHA-256: 744b9db89f6659519ccde662adc3be1cc189b4788d40bfd7c9ebed572b0ab4c7
font_02_sfnt_off00012d9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D9C 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361