Malicious PDF — malware analysis report

Static analysis result for SHA-256 eeab4bef726fc282…

MALICIOUS

PDF

82.9 KB Created: 2021-03-28 09:50:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: a79bce752d0d69d1b21fa7b0b0b5754f SHA-1: 23f312c5aa1068a81d177006cdbe3a41449e71c6 SHA-256: eeab4bef726fc2825b6e7184e013b320031c5ce318cab6b586780c403c95b044
186 Risk Score

Malware Insights

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

The sample is identified as malicious by multiple heuristics and an ML classifier, specifically flagged as a PDF phishing trojan. It functions as a link farm, containing numerous external URLs, with one prominent URL being `https://xajibur.ru/wix?keyword=hamilton+points+2018`. The PDF structure and the presence of embedded links suggest an attempt to direct users to potentially malicious or SEO-manipulated content, aligning with phishing or spamming tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • 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.
  • 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://xajibur.ru/wix?keyword=hamilton+points+2018 PDF link annotation
    • http://bowuvudofi.scienceontheweb.net/sisomubaxewowip.pdfIn PDF document text
    • https://sipebiwamedewor.weebly.com/uploads/1/3/4/7/134707389/f30aa57b0d4bb9.pdfIn PDF document text
    • http://tokio-2020.fun/dd_3.5_rulebooka8n7t.pdfIn PDF document text
    • https://tedisizizifem.weebly.com/uploads/1/3/4/2/134235801/842c60047b58.pdfIn PDF document text
    • https://menafemudiwifog.weebly.com/uploads/1/3/0/8/130813668/6045981.pdfIn PDF document text
    • https://segawalapuk.weebly.com/uploads/1/3/4/9/134902876/a3e3cab9.pdfIn PDF document text
    • http://businessmentality.com/how_to_clean_jenn_air_microwave_ovenyk5vf.pdfIn PDF document text
    • https://radigaligoled.weebly.com/uploads/1/3/4/3/134333621/6990959.pdfIn PDF document text
    • http://boraguw.medianewsonline.com/breast_cancer_tumor_markers.pdfIn PDF document text
    • http://patedeziw.mypressonline.com/kilesazixiviforivizus.pdfIn 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/f3314667-98d5-4e31-82bb-5f3582bc959a/muvixesaxipozezadek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2e352c3-a220-4a87-a6c8-e91fd66574a9/68018418511.pdfIn PDF document text
    • http://tisavan.onlinewebshop.net/muscle_fitness_download.pdfIn PDF document text
    • https://6b137298-3864-41c5-aaa3-11744000c3c2.filesusr.com/ugd/b916f4_fac26cb700d24872a3ec5e5f0f221a31.pdf?index=trueIn PDF document text
    • http://pilejifizodan.onlinewebshop.net/92269741109.pdfIn PDF document text
    • http://wenibeliso.atwebpages.com/anesthesia_machine_block_diagram.pdfIn PDF document text
    • http://mewabetowa.myartsonline.com/10104186646.pdfIn PDF document text
    • https://2ac56fc1-f7ee-4366-9cb2-1681469c68ee.filesusr.com/ugd/b914b5_bdab4caf559f4b9288d556d7859d0645.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6a52aac-5ed8-479e-984f-ee11f587fd2a/jensen_marine_radio_and_speakers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55d3d410-7cbb-47c9-9421-d91f6263d91a/64364769552.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19628ff2-31dd-494e-b798-73b723c33eae/the_5_dysfunctions_of_a_team_audiobook.pdfIn PDF document text
    • https://a62e46b8-d933-4087-892c-e5439cec6991.filesusr.com/ugd/e9cba9_97d3b968a12f496cb41e44b983b08cbd.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_off0000ed3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED3A 5348 bytes
SHA-256: 2374909bc84d7935d314947fbce1f80bccb99485bf144939c16711809456f69c
font_01_sfnt_off0000ff4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF4D 5188 bytes
SHA-256: 0742a84012cb2f715c9133f7b7b80091af66bdc8ae5c2ca771f8b62790425318
font_02_sfnt_off000111ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111CE 10700 bytes
SHA-256: 26578c1a37453167215346a51d4caebaf3d1462101747ca82001f0d445ace335
font_03_sfnt_off00013656.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13656 1760 bytes
SHA-256: bfbf286d797fda511cd23dd75b99952ed6b71f62506810308da92cc3ce1a3e35

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